Electronic device supporting fingerprint verification and method for operating the same

ABSTRACT

An electronic device is provided that includes a display in which a fingerprint recognition area is formed and which includes a display pixel layer, and a rear panel, formed under the display, having a first hole. The electronic device also includes a bracket, disposed under the rear panel, having a sensor accommodating area corresponding to a fingerprint sensor. The electronic device additionally includes the fingerprint sensor disposed under the display pixel layer and adapted to acquire image information to be used for authentication of a fingerprint using at least partially light radiated from the display pixel layer and reflected by the object. The sensor accommodating area has a second hole passing through the bracket, and the fingerprint sensor is disposed in the sensor accommodating area such that an air gap between the display and the fingerprint sensor is formed at least by a portion of the second hole.

PRIORITY

This application is a Continuation Application of U.S. application Ser.No. 16/443,330, filed in the U.S. Patent and Trademark Office (USPTO) onJun. 17, 2019, which is a Continuation Application of U.S. applicationSer. No. 15/491,589, filed in the USPTO on Apr. 19, 2017, now U.S. Pat.No. 10,366,272, issued on Jul. 30, 2019, which claims priority under 35U.S.C. § 119(a) to a Korean Patent Application filed on Apr. 19, 2016 inthe Korean Intellectual Property Office and assigned Serial number10-2016-0047727 and a Korean Patent Application filed on Mar. 13, 2017in the Korean intellectual Property Office and assigned Serial number10-2017-0031042, the entire contents of each of which is incorporatedherein by reference.

BACKGROUND 1. Field of the Disclosure

The present disclosure relates generally to a fingerprint verificationfunction, and more particularly, to an electronic device supporting afingerprint verification function and a method for operating the same.

2. Description of the Related Art

Conventionally, electronic devices support a fingerprint verificationfunction.

In a conventional electronic device having a fingerprint verificationfunction, a fingerprint sensor is disposed at a periphery of a lower endof a display area or on a rear surface of a case of the electronicdevice so that the electronic device may support a fingerprintauthentication function based on the fingerprint sensor.

Accordingly, in the conventional fingerprint recognition environment, auser must position a finger in an area of a lower end or a rear surfaceof a case for fingerprint authentication. In the process, if theelectronic device having a structure in which a fingerprint sensor isdisposed at a lower end of the case, it is difficult for the user toposition a finger at a specified point while continuing to grip theelectronic device. Further, if an electronic device has a structure inwhich a fingerprint sensor is disposed on a rear surface of a case,errors may frequently occur in a fingerprint authenticating processbecause a user must use their senses to position a finger on thefingerprint sensor.

SUMMARY

In accordance with an aspect of the present disclosure, an electronicdevice is provided that includes a display in which a fingerprintrecognition area is formed in at least one portion thereof and whichincludes a display pixel layer, and a rear panel, formed under thedisplay, having a first hole corresponding to a portion of the displaypixel layer. The electronic device also includes a bracket, disposedunder the rear panel to support the display, having a sensoraccommodating area corresponding to the portion of the display pixellayer for disposing a fingerprint sensor. The electronic deviceadditionally includes the fingerprint sensor disposed under the displaypixel layer and adapted to acquire image information to be used forauthentication of a fingerprint corresponding to an object thatapproaches the fingerprint recognition area using, at least partially,light radiated from the display pixel layer and reflected by the object.The electronic device further includes a processor adapted to control atleast one function of the fingerprint sensor for the acquiring of theimage information, and a printed circuit board disposed under thebracket, wherein the printed circuit board is electronically connectedwith the fingerprint sensor. The sensor accommodating area in thebracket has a second hole passing through the bracket, and thefingerprint sensor is disposed in the sensor accommodating area suchthat an air gap between the display and the fingerprint sensor is formedat least by a portion of the second hole.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of the presentdisclosure will be more apparent from the following detaileddescription, taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 is a view illustrating an external appearance of an electronicdevice supporting a fingerprint authentication function according to anembodiment of the present disclosure;

FIG. 2 is an exploded perspective view of an electronic device accordingto an embodiment of the present disclosure;

FIG. 3A is a view illustrating an electronic device having a fingerprintsensor according to an embodiment of the present disclosure;

FIG. 3B is a view illustrating a chip on panel (COP) type electronicdevice according to an embodiment of the present disclosure;

FIG. 3C is a view illustrating a chip on film (COF) type electronicdevice according to an embodiment of the present disclosure;

FIG. 4 is a view illustrating a fingerprint sensor of an electronicdevice according to an embodiment of the present disclosure;

FIG. 5 is a view illustrating a fingerprint sensor of an electronicdevice according to an embodiment of the present disclosure;

FIG. 6AA is a view illustrating a fingerprint sensor dispositionstructure of an electronic device according to an embodiment of thepresent disclosure;

FIGS. 6AB and 6AC are partial views of FIG. 6AA according to embodimentsof the present disclosure;

FIGS. 6BA, 6BB, and 6BC are views illustrating a fingerprint sensordisposition structure of an electronic device according to embodimentsof the present disclosure;

FIGS. 6CA, 6CB, and 6CC are views illustrating a fingerprint sensordisposition structure of an electronic device according to an embodimentof the present disclosure;

FIG. 7 is a view illustrating a disposition of a wavelength selectionsubstrate of an electronic device according to an embodiment of thepresent disclosure;

FIG. 8 is a view illustrating a disposition of a wavelength selectionsubstrate of an electronic device according to an embodiment of thepresent disclosure;

FIG. 9A is a view illustrating a disposition of a wavelength selectionsubstrate of an electronic device according to an embodiment of thepresent disclosure;

FIG. 9B is a view illustrating a light path related to fingerprintauthentication according to an embodiment of the present disclosure;

FIG. 10 is an exploded perspective of an electronic device including afingerprint sensor sheet according to an embodiment of the presentdisclosure;

FIG. 11A is a view illustrating a pixel structure of an electronicdevice according to an embodiment of the present disclosure;

FIG. 11B is a view illustrating a fingerprint sensor in a pixelstructure of an electronic device according to an embodiment of thepresent disclosure;

FIGS. 12AA, 12AB, and 12AC are views illustrating changing a touchsensitivity of an electronic device according to an embodiment of thepresent disclosure;

FIG. 12B is a flowchart of a method of operating an electronic device inrelation to recognition of a fingerprint according to an embodiment ofthe present disclosure;

FIG. 12C is a flowchart of a method of operating an electronic device inrelation to recognition of a fingerprint according to an embodiment ofthe present disclosure;

FIG. 13 is an electronic device operating environment according to anembodiment of the present disclosure;

FIG. 14 is a processor according to an embodiment of the presentdisclosure;

FIG. 15A is a flowchart of a fingerprint operating method based on achange in a display state value of a fingerprint authentication areaaccording to an embodiment of the present disclosure;

FIG. 15B is a view of a screen interface related to a change in adisplay state value of a fingerprint authentication area according to anembodiment of the present disclosure;

FIG. 16 is a flowchart of a hovering signal based fingerprint operatingmethod according to an embodiment of the present disclosure;

FIG. 17 is a flowchart of a fingerprint operating method using a displaydriver integrated-circuit (DDI) according to an embodiment of thepresent disclosure;

FIG. 18 is a flowchart of a fingerprint operating method of changing adisplay state value by using a DDI according to an embodiment of thepresent disclosure;

FIG. 19 is a flowchart of a fingerprint operating method of changing adisplay state value by using a fingerprint sensor according to anembodiment of the present disclosure;

FIG. 20 is a view of a condensing light waveform according to anembodiment of the present disclosure;

FIG. 21A is a chart of a display state value changing range according toan embodiment of the present disclosure;

FIG. 21B is a chart indicating a specified range of wavelength bandsaccording to an embodiment of the present disclosure;

FIG. 22 is a view illustrating a screen interface related to anoperation of an electronic device according to an embodiment of thepresent disclosure; and

FIG. 23 is a block diagram of an electronic device according to anembodiment of the present disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE PRESENT DISCLOSURE

Various embodiments of the present disclosure are described withreference to the accompanying drawings. Accordingly, those of ordinaryskill in the art will recognize that a modification, an equivalent,and/or an alternative on the various embodiments described herein may bevariously made without departing from the scope and spirit of thepresent disclosure. With regard to the description of the accompanyingdrawings, similar elements may be marked by similar reference numerals.

In the present disclosure, the expressions “have”, “may have”,“include”, “comprise”, “may include”, and “may comprise” used hereinindicate the existence of corresponding features (e.g., elements such asnumeric values, functions, operations, or components) but do not excludethe presence of additional features.

In the present disclosure, the expressions “A or B”, “at least one of Aand/or B”, “one or more of A and/or B”, and the like used herein mayinclude any and all combinations of one or more of the associated listeditems. For example, the expressions “A or B”, “at least one of A and B”,and “at least one of A or B” may refer to all of a case (1) where atleast one A is included, a case (2) where at least one B is included,and a case (3) where both of at least one A and at least one B areincluded.

The terms “first”, “second”, and the like used herein may refer tovarious elements of various embodiments, but are not intended to limitthe elements. Furthermore, such terms may be used to distinguish oneelement from another element. For example, “a first user device” and “asecond user device” may indicate different user devices regardless ofthe order or priority thereof. For example, “a first user device” and “asecond user device” indicate different user devices.

It is intended that when an element (e.g., a first element) is referredto as being “(operatively or communicatively) coupled with/to” or“connected to” another element (e.g., a second element), the element maybe directly coupled with/to or connected to the other element or anintervening element (e.g., a third element) may be present. In contrast,when an element (e.g., a first element) is referred to as being“directly coupled with/to” or “directly connected to” another element(e.g., a second element), it is intended that there are no interveningelement (e.g., a third element).

According to the situation, the expression “configured to” may beinterchangeably used with the expressions “suitable for”, “having thecapacity to”, “designed to”, “adapted to”, “made to”, or “capable of”.The term “configured to” may not indicate only “specifically designedto” in hardware. Instead, the expression “a device configured to” mayindicate that the device is “capable of” operating together with anotherdevice or other components. A central processing unit (CPU), forexample, a “processor configured to perform A, B, and C”, may indicate adedicated processor (e.g., an embedded processor) for performing acorresponding operation or a general purpose processor (e.g., a CPU oran application processor (AP)) which may perform correspondingoperations by executing one or more software programs which are storedin a memory device.

Terms used in the present disclosure are used to describe certainembodiments but are not intended to limit the scope of the presentdisclosure. A term of a singular form may include a plural form unlessotherwise indicated. Unless otherwise defined herein, all the terms usedherein, may have the same meanings that are generally understood by aperson skilled in the art. It may be further understood that terms,which are defined in a dictionary and commonly used, should also beinterpreted as is customary in the relevant related art and not in anidealized or overly formal manner unless expressly so defined herein invarious embodiments of the present disclosure. In some cases, even ifterms are defined in the present disclosure, they are not intended to beinterpreted to exclude embodiments of the present disclosure.

An electronic device according to various embodiments of the presentdisclosure may include at least one of smartphones, tablet personalcomputers (PCs), mobile phones, video telephones, e-book readers,desktop PCs, laptop PCs, netbook computers, workstations, servers,personal digital assistants (PDAs), portable multimedia players (PMPs),moving picture experts group (MPEG-1 or MPEG-2) audio layer 3 (MP3)players, mobile medical devices, cameras, wearable devices (e.g.,head-mounted-devices (HMDs), such as electronic glasses), an electronicapparel, electronic bracelets, electronic necklaces, electronicaccessories, electronic tattoos, smart watches, and the like.

According to another embodiment, the electronic devices may be homeappliances. The home appliances may include at least one of, forexample, televisions (TVs), digital versatile disc (DVD) players, audioplayers, refrigerators, air conditioners, cleaners, ovens, microwaveovens, washing machines, air cleaners, set-top boxes, home automationcontrol panels, security control panels, TV boxes (e.g., SamsungHomeSync®, Apple TV®, or Google TV®), game consoles (e.g., Xbox® orPlayStation®), electronic dictionaries, electronic keys, camcorders,electronic picture frames, or the like.

According to an embodiment, the electronic devices may include at leastone of medical devices (e.g., various portable medical measurementdevices (e.g., a blood glucose monitoring device, a heartbeat measuringdevice, a blood pressure measuring device, a body temperature measuringdevice, and the like)), a magnetic resonance angiography (MRA) device, amagnetic resonance imaging (MRI) device, a computed tomography (CT)device, scanners, and ultrasonic devices), navigation devices, globalpositioning system (GPS) receivers, event data recorders (EDRs), flightdata recorders (FDRs), vehicle infotainment devices, electronicequipment for vessels (e.g., navigation systems and gyrocompasses),avionics, security devices, head units for vehicles, industrial or homerobots, automated teller machines (ATMs), point of sale (POSs) devices,or Internet of Things devices (e.g., light bulbs, various sensors,electric or gas meters, sprinkler devices, fire alarms, thermostats,street lamps, toasters, exercise equipment, hot water tanks, heaters,boilers, and the like).

According to an embodiment, electronic devices may include at least oneof parts of furniture or buildings/structures, electronic boards,electronic signature receiving devices, projectors, or various measuringinstruments (e.g., water meters, electricity meters, gas meters, or wavemeters, and the like). An electronic device may be one of theabove-described various devices or a combination thereof. An electronicdevice may be a flexible device. Furthermore, an electronic device isnot intended to be limited to the above-described electronic devices andmay include other electronic devices and newly developed electronicdevices.

Hereinafter, an electronic device according to the various embodimentsof the present disclosure may be described with reference to theaccompanying drawings. The term “user” used herein may refer to a personwho uses an electronic device or may refer to a device (e.g., anartificial intelligence electronic device) that uses an electronicdevice.

FIG. 1 is a view illustrating an external appearance of an electronicdevice 100 supporting a fingerprint authentication function according toan embodiment of the present disclosure.

Referring to FIG. 1 , the electronic device 100, for example, may have atetragonal shape, and corners of the electronic device 100 may be atleast partially rounded. Further, the electronic device 100 may be of anedge type in which at least one of side of the electronic device 100(e.g., a left side or a right side of the electronic device 100 withreference to a longitudinal display state of a display 160) graduallycurves toward a periphery of the electronic device 100. The electronicdevice 100 may have a form (e.g., a front surface full screen or anedge-to-edge display) in which the display is expanded to at least oneof a lower end or an upper end of a screen.

According to an embodiment of the present disclosure, a fingerprintsensor 180 that senses a fingerprint of a user, which contacts at leasta partial area of the display may be disposed in a space (e.g., adisplay pixel layer or under the display pixel layer) that issubstantially perpendicular to at least a partial area of an activearea, in which a screen of the display is displayed, in a thicknessdirection (e.g., a z-axis direction). The fingerprint sensor 180 mayhave a specified (or certain, or specific) size (e.g., a sizecorresponding to a technical and statistical size, by which afingerprint of a user may be verified), and may be disposed on one sideof a rear surface or an entire area of the display 160, for example, ina form of a substrate or a sheet. The fingerprint sensor 180 may receiveat least one portion (e.g., light reflected by a finger in contact witha surface of the display 160) of the light radiated from at least onepixel disposed in the display to constitute image information that isnecessary for recognition of a fingerprint, and may store the imageinformation in an internal memory of the fingerprint sensor 180 or amemory (e.g., memory 130 of FIG. 13 described below) of the electronicdevice 100 such that a processor (e.g. an AP, a DDI, and a low-powerprocessor) of the electronic device 100 may access the imageinformation.

At least one portion of the display 160 may be transparent. For example,the display 160 may have a specified transparency (e.g., about 2 to 5%)for light of a specified wavelength band (a wavelength band of 550 nm).Further, an area of the display 160, which includes at least one portionof an area in which the fingerprint sensor 180 is disposed, may betransparent. In this case, the fingerprint sensor 180 may include alight emitting unit and a light receiving unit, and may radiate light byusing the light emitting unit in correspondence with the control of theprocessor, may receive the radiated light, and may collect imageinformation that is necessary for fingerprint verification.

As described above, the electronic device 100 having the fingerprintverification function may collect image information that is necessaryfor fingerprint verification by using the light radiated from a pixelincluded in the display 160. In this case, the fingerprint sensor 180may be located below locations of the pixels of the display 160, and maycollect and process light that returns through a transparent substratein which pixels are disposed.

FIG. 2 is an exploded perspective view of an electronic device 100according to an embodiment of the present disclosure.

Referring to FIG. 2 , the electronic device 100 may include a display160, a rear panel 190, a fingerprint sensor 180, a printed circuit board210, a battery 220, and a rear cover 230. Additionally, the electronicdevice 100 may further include a case surrounding side surfaces of thedisplay 160. The electronic device 100 may further include a bracket 240fixing the display 160, the rear panel 190, the printed circuit board210, and the battery 220 between the rear panel 190 and the printedcircuit board 210. The bracket 240 may be provided as a part of the case(e.g., integrally formed with the case) or may include the case.

The display 160 may include a plurality of pixels disposed in a matrixform, wiring lines adapted (or configured) to supply electrical power tothe pixels, a DDI adapted (or configured) to supply a signal to thewiring lines, and a substrate on which the pixels, the wiring lines, andthe DDI are positioned. At least an area of the display 160 may betransparent (or have a specified transparency). For example, the gapsbetween the wiring lines of the display 160 may have a specifiedtransparency (e.g., 2 to 5% at a wavelength around 550 nm) such thatlight may pass through the gaps. The display 160 may occupy at least oneportion of a front surface of the electronic device 100. The pixelsdisposed in the display 160 may radiate light based on the control ofthe processor or the DDI. The light radiated from the pixel is reflectedby an object (e.g., a finger) disposed on a front surface of the display160, and may be delivered to the light receiving unit of the fingerprintsensor 180 after passing through the display 160.

The fingerprint sensor 180 is disposed under the rear panel 190 locatedunder the display 160, and may face an area of the display 160 through asensor disposition area 191 (e.g., an aperture or a hole) formed in therear panel 190. Based on the above-described structure, the fingerprintsensor 180 may sense a fingerprint of a finger touching an area of thedisplay 160. The fingerprint sensor 180 may be disposed on a rearsurface of the display 160, at least an area of which is formed to betransparent through a sensor disposition area 191 to collect lightintroduced through the display 160. For example, the fingerprint sensor180 may be radiated from at least one pixel (or at least one pixeldisposed in a fingerprint authentication area) included in the display160 and may receive light reflected by an object located in afingerprint authentication area through the sensor disposition area 191.The fingerprint authentication area may include an area of the display160, in which the fingerprint sensor 180 is disposed. Further, thefingerprint authentication area may take an area of the display 160,which faces the fingerprint sensor 180 as a minimum size area, and mayfurther include an area (e.g., an area that is larger than an areacorresponding to the size of the fingerprint sensor 180 by a specifiedsize or more) of a specified size, which is touched by a finger of theuser or the like with respect to an area facing the fingerprint sensor180.

According to various embodiments of the present disclosure, thefingerprint sensor 180 may include a light emitting unit that mayradiate light that is to be used as a light source for authentication ofa fingerprint, and a light receiving unit that may collect the lightreflected by the body (e.g., a finger) of the user. If the light iscollected, the fingerprint sensor 180 may produce image informationcorresponding to the collected light, and may store the produced imageinformation such that the image information may be used by a processordisposed in the printed circuit board 210. The fingerprint sensor 180may deliver an event (e.g., information indicating whether imageinformation is acquired) on acquisition of image information to the DDIincluded in the display 160. In this case, the electronic device 100 mayfurther include a signal line that may deliver the event between thefingerprint sensor 180 and the DDI.

The rear panel 190 may be disposed on a rear surface of the display 160to protect the display 160 from an impact, support the display 160 onthe housing (e.g., a bracket), or emit (or spread) heat generated by thedisplay 160. For example, the rear panel 190 may include a protectivelayer (e.g., interchangeably a support layer) (e.g., an embossing layeror a cushion layer) having an embossing pattern, and a heat radiatinglayer, at least one portion of which is metallic. The protective layer,for example, may include a cushion for absorbing an impact, sponge, or alight shielding member (e.g., a black sheet or a black printing layer)for shielding light, and the configurations may be integrally formed ora plurality of layers for the configurations may be stacked. The rearpanel 190 may include an electromagnetic induction panel (or adigitizer). The electromagnetic induction panel may detect an approachof an electromagnetic inductor such as a stylus pen. The electromagneticinduction panel may be disposed between the protective layer and theheat radiating layer. The rear panel 190 may include a hole type sensordisposition area 191, into which the fingerprint sensor 180 is insertedor which is vertically aligned with at least one portion of thefingerprint sensor 180. The sensor disposition area 191 may include ahole passing through the front and rear surfaces of the front panel 190while having a specified size corresponding to the size of thefingerprint sensor 180. For example, a hole that passes through the rearpanel 190 may pass through the front and rear sides (or vertically) ofthe protective layer, the electromagnetic induction panel, and the heatradiating layer.

The bracket 240 may be disposed between the rear panel 190 and theprinted circuit board 210. The bracket 240 may include a first sensoraccommodating area 241, in which the fingerprint sensor 180 isaccommodated to be affixed. The first sensor accommodating area 241, forexample, may have a hole passing through the front and rear surfaces ofthe bracket 240 or a recess engraved to a specified depth while having aspecified size corresponding to the size of the fingerprint sensor 180.The bracket 240 may further include a wiring hole or a wiring recess inwhich wiring lines for electrical connection of the accommodated (orseated) fingerprint sensor 180 and the processor disposed in the printedcircuit board 210 are disposed.

The printed circuit board 210 may be disposed under the bracket 240. Oneor more hardware components (e.g., a camera module, a microphone, aspeaker, or a universal serial bus (USB) interface) of the electronicdevice 100 may be disposed in the printed circuit board 210. A processoradapted (or configured) to perform processing related to fingerprintauthentication may be disposed in the printed circuit board 210.Further, the printed circuit board 210 may include a contact pointelectrically connected to the battery 220, and may include a wiring linethat may deliver electrical power provided by the battery 220 to thefingerprint sensor 180 and the display 160. A processor disposed in theprinted circuit board 210 may be connected to the display 160. Theprocessor may output a fingerprint authentication guide LI on thedisplay 160 in correspondence with a request for fingerprintauthentication. The processor may control a screen of the display 160 ormay control at least one of the luminance or the color of thefingerprint authentication area such that the fingerprint authenticationarea has a specified luminance or a specified color during a fingerprintauthentication process.

The battery 220 may be disposed in a layer that is under the rear panel190 and parallel to the printed circuit board 210. The battery 220 maysupply electrical power to the printed circuit board 210 electricallyconnected to the battery 220, and may supply electrical power tocomponents (e.g., the display 160 and the fingerprint sensor 180) incorrespondence to the control of a processor of the printed circuitboard 210.

The rear cover 230 may be disposed under the printed circuit board 210and the battery 220 to at least partially surround the printed circuitboard 210 and the battery 220. The rear cover 230 may be formed ofvarious materials (e.g., plastic, metal, or glass). The rear cover 230may be affixed to the above-described case or bracket 240.

FIG. 3A is a view illustrating an electronic device having a fingerprintsensor according to an embodiment of the present disclosure.

Referring to FIG. 3A, the electronic device 300 a may include a display160, a rear panel 190, a fingerprint sensor 180, a bracket 240, abattery 220, and a printed circuit board 210, a wireless chargingcircuit 231, and a rear cover 230. The wireless charging circuit 231,for example, may include a circuit (e.g., a wireless power transfer(WPC) circuit) that may wirelessly charge the battery 220. The wirelesscharging circuit 231 may further include a near field communication(NFC) antenna or a magnetic secure transmission (MST) antenna.

The display 160 may include an external protective layer 161 (e.g., aglass cover), a design layer 162, a bonding layer 163 (e.g., a pressuresensitive adhesive), a polarizer layer 164, and a display panel 165 (forexample, an active-matrix organic light-emitting diode (AMOLED) panel).Here, the design layer 162 may be omitted, through a change in a designmethod. The external protective layer 161 may be formed of a transparentmaterial, such as glass or a polymer. The external protective layer 161may correspond to 0.1 t (“t” means “millimeter”) to 1.0 t (for example,0.5 t (mm)). The design layer 162 may be a layer in which a pattern, alogo or the like is printed. The remaining areas of the design layer162, except for the area in which a logo or the like is disposed, may betransparent. The bonding layer 163 may be disposed between the externalprotective layer 161 and the polarizer layer 164 to affix the externalprotective layer 161 to the polarizer layer 164. Light (e.g., naturallight) introduced from the external protective layer 161 or light (e.g.,a pixel light) radiated from the display panel 165 to the outsidevibrates in various directions, and the bonding layer 163 may correspondto 0.05 t to 0.3 t (for example, 0.15 t (mm)). The polarizer layer 614may transmit light, which vibrates only in a specified direction). Thepolarizer layer 164 may correspond to 0.05 t to 0.3 t (for example,0.147 t (mm)).

The display panel 165 may include a touch sensor and a display unit. Thedisplay panel 165 may correspond to 0.1 t to 0.3 t (for example, 0.14 t(mm)). The touch sensor may be disposed in a matrix form. The touchsensor may be electrically connected to a touch driving module. Thetouch driving module, for example, may be positioned in the flexibleprinted circuit board 160 a, may be electrically connected to the touchsensor, and/or may be electrically connected to the touch sensor and theprinted circuit board 210 through the flexible printed circuit board 160a. The display unit may include at least one pixel. The display unit,for example, may include organic light-emitting diode (OLED) basedpixels that may emit light by themselves. The display unit may outputlight related to a specified image in correspondence with control of theprocessor or the DDI based on the electrical power supplied by thebattery 220. The display panel 165 may further include a DDI (or adisplay driving module, display driving module may include the DDI)related to the control of the display unit is disposed. For example, theDDI may be mounted in a COP type on a non-display area of the displaypanel 165. The DDI disposed in the display panel 165 may be connected tothe printed circuit board 210 through the flexible printed circuit board160 a. In this regard, a hole that vertically passes through the bracket240 may be provided on at least one portion of the bracket 240, and theflexible circuit board 160 a may be electrically connected to theprinted circuit board 210. In this case, the display panel 165 may be ofa flexible type, and a portion (e.g., a right periphery) of the displaypanel 165 may be curved. A portion that extends from the display panel165 to be curved may be electrically connected to the flexible printedcircuit board 160 a. A display driving module (e.g., a DDI or a touchdriver IC (TDI)) may be disposed in a COF type on at least one sidesurface of the flexible printed circuit board 160 a. The DDI and the TDImounted in a COF type may be integrally embodied on the flexible printedcircuit board 160 a. Further, a fingerprint sensor may be disposed onthe flexible printed circuit board 160 a, and the DDI and the TDI of thefingerprint sensor may be integrally embodied. Further, a pressuresensor may be disposed on the flexible printed circuit hoard 160 a, andthe pressure sensor may be integrally embodied in at least one of theDDI and the TDI.

The fingerprint sensor 180 may be accommodated (or seated) in the sensordisposition area 191 in which a hole is formed by removing at least apartial area of at least one layer of the protective layer 193 or theheat radiating layer 195 of the rear panel 190. Further, the fingerprintsensor 180 may be arranged under the sensor disposition area 191 of therear panel 190. The fingerprint sensor 180 may collect light radiatedfrom a light source (e.g., the pixels of the display panel 165),reflected by a body (e.g., a finger) of a user, and introduced to therear surface of the display 160 through a transparent area of thedisplay 160. The fingerprint sensor 180 may be disposed on the flexibleprinted circuit board 160 a. The electronic device 300 a may furtherinclude a wiring line that may deliver image information generated bythe fingerprint sensor 180 to the processor. The wiring line connectedto the fingerprint sensor 180, for example, may be disposed on one sideof the flexible printed circuit board 160 a and may be electricallyconnected to the processor of the printed circuit board 210. In theelectronic device 300 a, the DDI related to driving of the display panel165 may include an integrated circuit (IC) that drives the fingerprintsensor 180, and in this case, the electronic device 300 a may furtherinclude a wiring line that connects the fingerprint sensor 180. Thefingerprint sensor 180 may deliver an event based on recognition of anapproach of a finger to the DDI through the wiring line. In relation tothe determination of the approach of the finger, if the fingerprintsensor 180 acquires image information of the finger or the fingerprintand stores the image information in a memory (e.g., an internal registeror a buffer of the fingerprint sensor 180, the processor may determinean approach of an object based on the image information stored in thememory. The processor may determine an approach of an object (or anapproach of a finger) if the intensity of illumination of a fingerprintdecreases to a specified intensity of illumination or less. In thiscase, the electronic device 300 a may further include a luminance sensorwhich is described below with reference to in FIG. 23 . When theelectronic device 300 a includes a separate luminance sensor, theprocessor may acquire luminance information in a specified direction ofthe electronic device based on the luminance sensor and may identify anapproach of a fingerprint according to the luminance information inadvance. For example, the processor may activate the fingerprint sensor180 if a luminance of the outside is a specified value or less, based onthe luminance sensor. The luminance sensor may be disposed in an areathat is adjacent to a location of the fingerprint sensor 180 or may bedisposed at a location at which the electronic device 300 a is gripped.

The rear panel 190 may be disposed on the whole rear surface of thedisplay 160, except for an area in which the fingerprint sensor 180 isdisposed. As described above, the rear panel 190 may include aprotective layer 193 having an embossing pattern, and a heat radiatinglayer 195 (e.g., a copper layer) having a heat radiating function. Theprotective layer 193 may restrain or prevent an impact from beingapplied to the display panel 165 based on the black embossing cushion,or may improve the visibility of the display panel 165. The protectivelayer 193 may correspond to 0.1 t to 0.3 t (for example, 0.14 t (mm)).The heat radiating layer 195 may be electrically connected to thedisplay driving module to function as a ground (e.g., shielding ofnoise) of the display driving module. The heat radiating layer 195 maycorrespond to 0.02 t to 0.1 t (for example, 0.04 t (mm)). A portion ofthe protective layer 193 may be disposed under the display panel 165,and a remaining portion of the protective layer 193 may be positioned onthe heat radiating layer 195. For example, the protective layer 193 mayinclude an embossing layer and a cushion layer, the embossing layer maybe disposed under the display panel 165 and the cushion layer may bepositioned under the heat radiating layer 195.

The bracket 240 may support the display 160 while electricallyinsulating the rear panel 190, the printed circuit board 210, or thebattery 220. At least one portion of the bracket 240 may be formed of anonmetallic material, and the remaining areas (e.g., a side surface ofthe case) of the bracket 240 may be formed of a metallic material. Forexample, the whole bracket 240 may be formed of a nonmetallic material,or may be formed of a metallic material.

The battery 220 may be accommodated in and affixed to one side of thebracket 240. The printed circuit board 210 may be disposed on thebracket 240 to surround the battery 220. The printed circuit board 210may include a first part, to which a USB interface 221 is coupled, and asecond part electrically connected to the flexible printed circuit board160 a in which a processor is disposed, and may include a third partconnecting the first part of the printed circuit board 210 and thesecond part of the printed circuit board 210.

Although FIG. 3A illustrates that the fingerprint sensor 180 is disposedon the bracket 240 in an area in which the USB interface 221 isdisposed, the present disclosure is not limited thereto. At least oneportion of the fingerprint sensor 180 may be disposed on the bracket 240in an area in which the battery 220 is disposed.

FIG. 3B is a view illustrating an example of a COP type electronicdevice according to an embodiment of the present disclosure.

Referring to FIG. 3B, an electronic device 300 b according to anembodiment may include a display 160, a rear panel 190 including adigitizer 301, a fingerprint sensor 180, and a pressure sensor 320.Additionally or alternatively, the electronic device 300 b may furtherinclude a bracket or a battery.

The display may include an external protective layer 161, a firstbonding layer 162_1, a polarizer layer 310, a second bonding layer162_2, and a display panel 165. Further, the display may include adisplay driving module 160 a_1, and may further include a display panelextension 165_1 in which the display driving module 160 a_1 is disposed.The display panel 165 may include a touch panel. A bonding layer 165_9may be disposed between the display panel extension 165_1 and a heatradiating layer 190_3.

The external protective layer 161 may have a configuration that is thesame as or similar to that of the external protective layer 161described above with regard to FIG. 3A. The first bonding layer 162_1may bond the external protective layer 161 and the polarizer 310. Thesecond bonding layer 162_2 may bond the polarizer layer 310 and thedisplay panel 165. In relation to visual recognition of an imageembodied on the display panel 165, the first bonding layer 162_1 and thesecond bonding layer 162_2 may be formed of an optically clear adhesive.

The display panel 165 may be formed of a flexible panel, and asillustrated, the display panel extension 165_1 may be disposed at aportion of a rear surface of the display panel 165 while being curved bya specified angle (e.g., 180 degrees or more) with respect to thedisplay panel 165. The display driving module 160 a_1 may be disposed onthe display panel extension 165_1 (e.g., a COP type). Additionally oralternatively, the display panel 165 may include a touch panel. A signalcircuit related to the driving of the touch panel may be disposed on thedisplay panel extension 165_1, and the touch panel driving IC may bedisposed in and integrated with the display driving module 160 a_1.

The display driving module 160 a_1 may include a DDI that drives thedisplay panel 165, and a touch driving module that drives the touchpanel included in the display panel. The display driving module 160 a_1may be disposed on the display panel extension 165_1. Additionally,signal lines for supplying a data signal and a gate signal to thedisplay panel 165 may be disposed on the display panel extension 165_1.

The display panel extension 165_1 may be disposed on a rear surface ofone side of the display panel 165 to be curved after extending from oneside of the display panel 165 by a specified length. At least oneportion of the display panel extension 165_1 may include a non-displayarea, and at least one signal line may be disposed at the at least oneportion of the display panel extension 165_1 to supply a signal to thedisplay panel 165. The display driving module 160 a_1 may be disposed onone side of the display panel extension 165_1. An end of the displaypanel extension 165_1 may be electrically connected to one side of thecircuit board 330 for sensors, in which a fingerprint sensor 180 isaccommodated (or seated). The display panel extension 165_1 may beformed when the display panel 165 is formed. The circuit board 330 forsensors, for example, may be included in the fingerprint sensor 180.

The rear panel 190 may include a protective layer 193, a heat radiatinglayer 190_3, and a digitizer 301 disposed between the protective layer193 and the heat radiating layer 190_3. A hole may be formed in an areaof the rear panel 190, in which the sensor disposition area 191 isformed. The sizes of the holes formed in the protective layer 193 andthe heat radiating layer 190_3 of the rear panel 190 may be the same asor similar to the size of the hole formed in the digitizer 301.

The digitizer 301 may be included in the rear panel 190. For example,the digitizer 301 may be disposed between the protective layer 193 andthe heat radiating layer 190_3 of the rear panel 190. The digitizer 301,for example, may recognize an approach or contact of an accessory (e.g.,a stylus pen). The digitizer 301 may include a panel that may recognizean approach or contact of the accessory in an electromagneticallyinductive manner. The digitizer 301 may be electrically connected to themain printed circuit board 210 (as shown FIG. 3A) through a separateflexible printed circuit board (FPCB) 330. The digitizer 301 may beelectrically connected to one side of a rear surface of the displaypanel extension 165_1, and may be connected to the display drivingmodule 160 a_1 through the display panel extension 165_1. In this case,the display driving module 160 a_1 may further include a driving modulerelated to driving of the digitizer 301, and may transmit and receivesignals to and from the digitizer 301 through at least one signal linedisposed on the rear surface of the display panel extension 165_1. Oneside of the digitizer 301 may have a hole for forming the sensordisposition area 191. The size of the hole, for example, may correspondto the size of the fingerprint sensor 180, or may correspond to the sizeof the sensor disposition area 191 for sensing a fingerprint.

The fingerprint sensor 180 may be arranged under a hole corresponding tothe sensor disposition area 191 of the rear panel 190. The fingerprintsensor 180 may acquire a fingerprint image by outputting light andreceiving the reflected light. The fingerprint sensor 180 may beelectrically mounted (for example, soldered) on the circuit board 330for sensors. A third bonding layer 321 may be disposed between one sideof the fingerprint sensor 180 and the rear panel 190. The third bondinglayer 321 may be disposed at a periphery of the fingerprint sensor 180to have a band shape.

The pressure sensor 320 may be disposed on the circuit board 330 forsensors, and may surround the fingerprint sensor 180. Further, thepressure sensor 320 may be disposed to surround the sensor dispositionarea 191. For example, the pressure sensor 320 may have a circular,elliptical, or polygonal band shape. The driving IC that drives thepressure sensor 320 may be disposed in any one of the printed circuitboard 210 or the circuit board 330 for sensors, and a sensing part forsensing a pressure may be disposed between the rear panel 190 and thecircuit board 330 for sensors. A bonding layer may be disposed betweenan upper end of the sensing part and the rear panel 190.

At least one of the fingerprint sensor 180 and the pressure sensor 320may be accommodated on the circuit board 330 for sensors. The circuitboard 330 for sensors may be aligned with and disposed in the sensordisposition area 191. One side of the circuit board 330 for sensors maybe electrically or physically connected to one side of the display panelextension 165_1. The circuit board 330 for sensors may receive a signalor an electric voltage related to driving from the display drivingmodule 160 a_1 disposed in the display panel extension 165_1.

As described above, the electronic device 300 b may include a digitizer301 disposed under the display panel 165, and a partial area of thedigitizer 301 may include a hole area that passes through the digitizer301 in consideration of the sensor disposition area 191 of thefingerprint sensor 180.

FIG. 3C is a view illustrating an example of a configuration of a COFtype electronic device according to an embodiment of the presentdisclosure.

Referring to FIG. 3C, an electronic device 300 c may include a display160, a rear panel 190 including a digitizer 301, a protective layer 193,and a heat radiating layer 190_3, a fingerprint sensor 180, and apressure sensor 320. Additionally or alternatively, the electronicdevice 300 c may further include a bracket or a battery.

The display 160 may include an external protective layer 161, a firstbonding layer 162_1, a polarizer layer 310, a second bonding layer162_2, and a display panel 165, and may include a display panelconnector 165_2 connected to one side of the display panel 165. Thedisplay panel 165 may include a touch panel. A bonding layer 165_9 maybe disposed between the display panel connector 165_2 and the heatradiating layer 190_3.

Among the above-mentioned configurations, the external protective layer161, the first bonding layer 162_1, the polarizer layer 310, the secondbonding layer 162_2, and the display panel 165 may be substantially thesame as or similar to the configuration of FIG. 3B described above.

One side of the display panel connector 165_2 may be electricallyconnected to one side of the display panel 165, and an opposite side ofthe display panel connector 165_2 may be disposed on a rear surface ofthe display panel 165 while being curved to be connected to the circuitboard 330 for sensors. A display driving module 160 a_1 may be disposedat an upper portion of one side of the display panel connector 165_2.The display panel connector 165_2 may be a flexible circuit film or aflexible circuit board of a film form. Signal lines related to drivingof the display panel 165 may be disposed on an upper surface (or a lowersurface) of the display panel connector 165_2, and signal lines relatedto driving of the digitizer 301 may be disposed on a lower surface (oran upper surface) of the display panel connector 165_2. Further, signallines related to driving of the display panel 165 may be disposed on oneside of an upper portion (or one side of a lower portion) of the displaypanel connector 165_2, and signal lines related to driving of thedigitizer 301 may be disposed at an opposite side of the upper portion(an opposite side of the lower portion) of the display panel connector165_2. After being provided independently from the display panel 165,the display panel connector 165_2 may be electrically connected to oneside of the display panel 165. Signal lines related to driving of thetouch panel may be disposed on one side of the display panel connector165_2, and the touch panel driving circuit may be included in thedisplay driving module 160 a_1.

Although it has been described that the display driving module 160 a_1includes the touch panel driving module, the present disclosure is notlimited thereto. For example, the touch panel driving module may beseparately disposed on the display panel extension 165_1 (As shown FIG.3B) or the display panel connector 165_2, and the touch panel drivingmodule may transmit and receive a signal to and from the touch panelthrough a signal line disposed on the display panel connector 165_2.

FIG. 4 is a view illustrating a fingerprint sensor of an electronicdevice 100 according to an embodiment of the present disclosure.

Referring to FIG. 4 , the electronic device 100 may include a case 101,a display 160, a rear panel 190, a fingerprint sensor 180, a bracket240, a printed circuit board 210, a battery 220, and a rear cover 230.

As described above, the display 160 may include an external protectivelayer 161, a bonding layer 163 (e.g., an optically clear adhesive(OCA)), a polarizer layer 164, and a display panel 165. In addition, thedisplay 160 may further include a design layer in which a logo or thelike is printed based on a design method. At least one portion (e.g., afingerprint authentication area in which the fingerprint sensor 180 isdisposed) of the above-described display may be transparent. Lightradiated from at least one pixel (e.g., pixels disposed in thefingerprint authentication area or pixels disposed in an area of aspecified size including the fingerprint authentication area) includedin the display panel 165 of the display 160 may be introduced into thefingerprint sensor 180 after passing through the interior of thetransparent display 160.

The rear panel 190 may be disposed under the display 160 and may includea sensor disposition area 191. The fingerprint sensor 180 may bedisposed under the sensor disposition area 191. Through the sensordisposition area 191, the fingerprint sensor 180 may collect lightpassing through the display 160.

The fingerprint sensor 180 may be disposed under the rear panel 190, andas illustrated, may be disposed in a first sensor accommodating area 241a provided on one side of the bracket 240. At least one portion (e.g.,the light receiving unit that may collect light) of an upper portion ofthe fingerprint sensor 180 may be exposed through the sensor dispositionarea 191 of the rear panel 190. Further, when the fingerprint sensor 180is provided in a form including both the light emitting unit and thelight receiving unit, a part in which the light emitting unit and thelight receiving unit are disposed may be exposed towards the display 160through the sensor disposition area 191. The light introduced throughthe transparent area of the display may be delivered to the fingerprintsensor 180 through the sensor disposition area 191.

The bracket 240 is disposed under the rear panel 190 to support the rearpanel 190, the display 160, and the like. At least one portion of thebracket 240 may be formed of a nonmetallic material or at least oneportion of the bracket 240 may be formed of a metallic material. Thebracket 240 may include a first sensor accommodating area 241 a. Thefirst sensor accommodating area 241 a may be formed by engraving an areaof a surface of the bracket 240, which is disposed towards the display160. The depth of the first sensor accommodating area 241 a maycorrespond to the height of the fingerprint sensor 180. The area of thefirst sensor accommodating area 241 a may correspond to the size of thefingerprint sensor 180. The first sensor accommodating area 241 a mayinclude at least one of a wiring recess or a wiring hole, in which thewiring lines of the accommodated fingerprint sensor 180 are disposed.The wiring recess or the wiring hole may function as a path electricallyconnecting the wiring lines connected to the fingerprint sensor 180, tothe printed circuit board 210 disposed under the bracket 240. Further, awiring line electrically connecting the display driving module disposedin the display 160 and the fingerprint sensor 180 may be disposed in thewiring recess or the wiring hole disposed in the first sensoraccommodating area 241 a.

The printed circuit board 210 may be disposed under the bracket 240, andmay be electrically connected to the display 160 and the fingerprintsensor 180. The processor related to driving of the display 160 anddriving of the fingerprint sensor 180 may be accommodated in the printedcircuit board 210. The battery 220 may be disposed in a layer that isunder the bracket 240 and parallel to the printed circuit board 210. Therear cover 230 may surround the printed circuit board 210, the battery220, and the like.

FIG. 5 is a view illustrating a fingerprint sensor of an electronicdevice 100 according to an embodiment of the present disclosure.

Referring to FIG. 5 , the electronic device 100 according to the presentdisclosure may include a case 101, a display 160, a rear panel 190, afingerprint sensor 180, a bracket 240, a printed circuit board 210, abattery 220, and a rear cover 230. The display 160, the rear panel 190,the printed circuit board 210, the battery 220, and the rear cover 230may have the same configurations as those of FIG. 4 described above.Further, the fingerprint sensor 180 may be arranged under the sensordisposition area 191 of the rear panel 190.

The bracket 240 may include a second sensor accommodating area 241 b, inwhich the fingerprint sensor 180 is disposed. The second sensoraccommodating area 241 b may have a hole passing through the front andrear surfaces of the bracket 240. The fingerprint sensor 180 may beaccommodated in and affixed to the second sensor accommodating area 241b. Accordingly, the area of the second sensor accommodating area 241 bmay correspond to an area corresponding to the size of the fingerprintsensor 180. A bonding layer may be disposed between a side surface ofthe second sensor accommodating area 241 b and the fingerprint sensor180 such that the fingerprint sensor 180 may be affixed to the secondsensor accommodating area 241 b. If the fingerprint sensor 180 isaccommodated in a seating hole, the fingerprint sensor may not beconnected to a display FPCB but may be directly connected to a main PCB.

The front surface of the fingerprint sensor 180 may be affixed at thesame height as that of the bracket 240 to be relatively close to thedisplay 160. If the fingerprint sensor 180 includes a light emittingunit and a light receiving unit, the light emitting unit of thefingerprint sensor may be disposed at an outer side of the fingerprintsensor and the light receiving unit of the fingerprint sensor 180 may bedisposed at the center of the fingerprint sensor 180. The lightreceiving unit of the fingerprint sensor 180 may face an area of thedisplay through the sensor disposition area 191 of the rear panel 190.The fingerprint sensor 180 of the present disclosure may include only alight receiving unit. The light radiated from a light source at aspecified location of the electronic device 100 may be reflected orrefracted and be collected by the fingerprint sensor 180. The lightsource may be disposed at a specified location of the interior of theelectronic device 100 that is adapted such that the radiated light mayreach the fingerprint area directly or indirectly, or by usingrefraction or reflection.

FIG. 6AA is a view illustrating a fingerprint sensor fixing structure ofan electronic device according to an embodiment of the presentdisclosure.

FIGS. 6AB and 6AC are partial views of FIG. 6AA according to anembodiment of the present disclosure.

Referring to FIGS. 6AA, 6AB, and 6AC, the electronic device 600 a mayinclude a case 101, a display 160, a rear panel 190, a fingerprintsensor 180, a bracket 240, a printed circuit board 210, a battery 220,and a rear cover 230. The display 160, the rear panel 190, the printedcircuit board 210, the battery 220, and the rear cover 230 may have thesame configurations as those of FIG. 4 described above. The fingerprintsensor 180 may be aligned with the sensor disposition area 191 of therear panel 190 to face an area (e.g., a transparent area) of the display160. The fingerprint sensor 180 may be accommodated in the first sensoraccommodating area 241.

According to an embodiment of the present disclosure, the fingerprintsensor 180 may be affixed to the rear panel 190 as in FIG. 6AB in case601. The light receiving unit (or the light emitting unit and the lightreceiving unit) of the fingerprint sensor 180 may be disposed at thecenter of a fingerprint sensor housing. Accordingly, one side of thesensor bonding layer 198 a, except for a central area of the fingerprintsensor housing in which the light receiving unit is disposed, may bebonded to a peripheral area of the fingerprint sensor housing. Anopposite side of the sensor bonding layer 198 a may be bonded to aperiphery of the sensor disposition area 191 of the rear panel 190disposed on the fingerprint sensor 180.

The fingerprint sensor 180 may be accommodated in and affixed to theabove-described sensor accommodating area 241. Then, a bonding materialis applied to an inside of the sensor accommodating area 241 to affixthe fingerprint sensor 180. Further, the sensor accommodating area 241may have the same size as that of the fingerprint sensor 180 such thatthe fingerprint sensor 180 may be interference-fitted with the sensoraccommodating area 241.

According to an embodiment of the present disclosure, the fingerprintsensor 180 may be affixed to the bracket 240 as in FIG. 6AC in case 603.For example, the fingerprint sensor 180 may include a sensor bondinglayer 198 b disposed on at least one portion of the rear surface or theside surface thereof. The fingerprint sensor 180 provided with thesensor bonding layer 198 b may be bonded to the sensor accommodatingarea 241 of the bracket 240. Additionally, a sealant 199 may be disposedso as to an aperture (or gap) between the fingerprint sensor 180 and therear panel 190 may be removed by the sealant 199. The sealant 199 mayhave an annular shape (e.g., an elliptical ring or polygonal ringshape), and may be disposed at a peripheral portion of the fingerprintsensor 180. An area in which the sealant 199 is disposed may be an areaexcept for a central area in which the light receiving unit (or thelight emitting unit and the light receiving unit) of the fingerprintsensor 180 is disposed. The sealant 199 is based on a selective design,and may be omitted based on a design policy or method. Further, thesealant 199 may include a bonding substance (e.g., an OCA or anoptically clear resin (OCR) to affix the fingerprint sensor 180 to therear panel 190.

The following corresponds to a method for maintaining an air gap betweena display panel and a fingerprint sensor. It may be necessary tomaintain an air gap for improving a recognition rate of a fingerprint.If a state when the fingerprint sensor is calibrated and a state whenthe fingerprint is actually used are different, recognition rate mayseverely deteriorate due to a low image quality. Accordingly, a step ofan air gap in a manufacturing process may be minimized through astructure of attaching the fingerprint sensor to a rear surface of thedisplay.

FIGS. 6BA, 6BB, and 6BC are views illustrating a fingerprint sensordisposition structure of an electronic device according to an embodimentof the present disclosure.

Referring to FIGS. 6BA, 6BB, and 6BC, a configuration of an electronicdevice 600 b may include a display 160, a protective layer 190_6, adigitizer 301_1, a bonding layer 302_1, and a fingerprint sensor 610(e.g., the fingerprint sensor 180). The protective layer 190_6 and thedigitizer 301_1 may be included in the above-described rear panel.Additionally or alternatively, a heat radiating layer 195 (e.g.,copper/graphite (Cu/Gr)) may be further disposed under the digitizer301_1. The protective layer 190_6 may be separated to be disposed at anindependent location. For example, a portion (e.g., an embossing layer)of the protective layer 190_6 may be disposed on the digitizer 301_1,and another portion (e.g., a cushion layer) of the protective layer190_6 may be disposed between a lower portion of the digitizer 301_1 andthe heat radiating layer 195.

The drawing illustrates only a portion including the sensor dispositionarea 191 related to sensing of a fingerprint, and as already describedabove with reference to FIG. 6AA, additionally or alternatively, theelectronic device 600 b may further include a bracket having a recess inwhich the fingerprint sensor 610 is accommodated, a printed circuitboard in which a processor that supplies a signal related to driving ofthe fingerprint sensor 610 is accommodated, a battery that supplieselectric power, and a rear cover.

According to various embodiments of the present disclosure, as in FIG.6BA in state 605, the fingerprint sensor 610 may have an air gap 620between the display 160 and the fingerprint sensor 610 (e.g., at leastone portion of the sensor disposition area 191 or at least one portionof the opening of the rear panel provided in the sensor disposition area191). The fingerprint sensor 610, for example, may include an opticallayer 610_1, a die 610_2, a sensor bonding layer 610_3, a substrate610_4, and a sensor case 610_6. The optical layer 610_1 may include alens micro array lens) layer that receives light related to sensor of afingerprint and/or an optical filter layer. The die 610_2 may include asemiconductor (e.g., a photodiode array) that, after converting thelight collected by the optical layer 610_1, delivers the electricalsignal to the substrate 610_4. The sensor bonding layer 610_3 may affixthe die 610_2 to the substrate 610_4. The substrate 610_4 may deliver anelectrical signal delivered from the die 610_2 to a component (e.g., aprocessor). In this case, one or more signal lines are disposed on thesubstrate 610_4, and the signal lines may be connected (e.g.,wire-bonded) to the die 610_2 through leads 610_5. The sensor case 610_6may be a structure that surrounds the optical layer 610_1 and the die610_2, and may be formed of non-conductive materials (e.g., a plasticstructure, a polymer structure or epoxy). Upper and lower sides of thesensor case 610_6 may be opened to have a passage adapted such thatlight related to sensing of a fingerprint may be received through theupper side of the sensor case 610_6 and an electrical signal for thesensed light may be delivered to the substrate 610_4 may be delivered tothe lower side of the sensor case 610_6.

The display 160 may have a configuration that is the same as or similarto the display described above with reference to FIG. 3A. For example,the display 160 may include an external protective layer includingglass, an optical bonding layer, a polarizer layer, a touch panel, anoptical bonding layer, and a display panel. Additionally, at least oneportion of the display 160 may further include a design layer. A holerelated to sensing of a fingerprint may be formed at a lower portion ofone side of the display 160, and a protective layer 190_6 aligned withthe sensor disposition area 191, the digitizer 301_1, the heat radiatinglayer 195, and the bonding layer 302_1 may be disposed.

The protective layer 190_6, for example, may include an embossing layeror a cushion layer, and may include a hole of a specified size formed inan area corresponding to the sensor disposition area 191. Aconfiguration (e.g., the embossing layer) of the protective layer 190_6may be disposed under the display to minimize a distance between thefingerprint sensor 610 and the display 160, and the remaining layers(e.g., the cushion layer) may be disposed under the digitizer 301_1.Further, the electronic device may further include a heat radiatinglayer 195, and the heat radiating layer 195 may be positioned under thedigitizer 301_1. A cushion layer may be further disposed under the heatradiating layer 195. Further, the heat radiating layer 195 may bedisposed in parallel to the bonding layer 302_1.

The digitizer 301_1 may be disposed under the protective layer 190_6,and may include a hole of a specified size formed in an areacorresponding to the sensor disposition area 191. The hole disposed inthe digitizer 301_1 may be aligned with and disposed vertically withrespect to the hole formed in the protective layer 190_6. The bondinglayer 302_1 may be disposed between the digitizer 301_1 and a peripheralarea of the fingerprint sensor 610, and the fingerprint sensor 610 maybe affixed to a lower portion of the digitizer 301_1. The bonding layer302_1 may have a band shape having an empty area at the center thereof.Accordingly, an air gap 620 may be formed in the sensor disposition area191 between the lower surface of the display 160 and the upper surfaceof the fingerprint sensor 610. The air gap 620 is an area in which airis disposed as a medium, and may be operated such that more lightrelated to a fingerprint may be provided to the fingerprint sensor 610while the light reflected to the surface of the fingerprint positionedon the display 160 are scattering through the air gap 620. For example,when the display 160 and the optical layer 610_1 of the fingerprintsensor 610 directly contact each other, light that travels from thedisplay 160 towards the fingerprint sensor 610 may be significantlyreflected on a contact surface of the two objects due to a differencebetween the permittivity of the media of the objects. The air gap 620may reduce the abrupt difference between the permittivity of the displayand the fingerprint sensor 610, and thus reduces reflectivity on thecontact surface of the display 160 and the fingerprint sensor 610 toincrease the light that enters the fingerprint sensor 610.

In the electronic device 600 b having the above-described structure, ifat least some pixels of the display 160 disposed on the sensordisposition area 191 or at least some pixels of the sensor dispositionarea 191 and an area of the display 160, which is adjacent to the sensordisposition area 191 within a specified distance emit light of aspecified color (e.g., a white color or a green color), the lightreflected from a surface of the fingerprint in contact with an upperportion of the display 160 may pass through the display 160 of thesensor disposition area 191, pass the air gap 620, and be delivered tothe fingerprint sensor 610.

According to various embodiments of the present disclosure, as in FIG.6BB in state 607, the electronic device 600 b may have a structure inwhich the protective layer 190_6 having a hole corresponding to thesensor disposition area 191 is disposed under the display 160, thedigitizer 301_2, the heat radiating layer 195, and the bonding layer302_2 are disposed under the protective layer 190_6, and the fingerprintsensor 610 is disposed under the bonding layer 302_2. In this case, thedigitizer 301_2 may have a hole corresponding to the size of one surface(e.g., an upper surface) of the fingerprint sensor 610. The heatradiating layer 195 included in the above-described rear panel may befurther disposed under the digitizer 301_2. The fingerprint sensor 610in state 607 may include an optical layer, a die, a sensor bondinglayer, a substrate, and a sensor case as described above with referenceto FIG. 6BA in state 605.

The bonding layer 302_2 may be disposed in the same layer as thedigitizer 301_2, and may directly bond the protective layer 190_6 andthe fingerprint sensor 610. Accordingly, an air gap 620_1 having aspecified thickness may be formed in the sensor disposition area 191between the lower surface of the display 160 and the fingerprint sensor610. The thickness of the air gap 620_1, for example, may have athickness including the thickness of the protective layer 190_6 and thebonding layer 302_2 (or the digitizer 301_2). The thickness of the airgap 620_1 is a thickness that is operated when light enters thefingerprint sensor 610 from the display 160, and may be designed to havea thickness of the protective layer 190_6 and the bonding layer 302_2based on the optical characteristics of the fingerprint sensor 610 asdescribed above with reference to FIG. 6BB in state 607 or to have thethickness of the protective layer, the digitizer, and the bonding layeras described above with reference to FIG. 6BA in state 605. The size ofthe hole at the center of the bonding layer 302_2 may have a size thatis not less than the size of the hole of the rear panel 190.

According to various embodiments of the present disclosure, as in FIG.6BC in state 609, the electronic device 600 b may have a structure inwhich the protective layer 190_6 having a hole corresponding to thesensor disposition area 191 is disposed under the display 160, thedigitizer 301_1 is disposed under the protective layer 190_6, and thefingerprint sensor 610 is disposed under the digitizer 301_1, and theoptical bonding layer 630 may be disposed between the display and thefingerprint sensor 610. The digitizer 301_1 may have a size that is thesame as or similar to the size of the hole of the area corresponding tothe sensor disposition area 191 of the rear panel 190, and may have ahole arranged vertically with respect to the hole of the protectivelayer 190_6. The interior of the hole of the protective layer 190_6 andthe interior of the hole of the digitizer 301_1 may be filled with aportion of the optical bonding layer 630. The optical bonding layer 630may be disposed under a periphery of the area in which the hole of thedigitizer 301_1 is formed to have a specified thickness to affix thefingerprint sensor 610 to the digitizer 301_1. The optical layer(PET)631 may be disposed in the optical bonding layer 630. The upper surfaceof the optical layer 631 may contact one side of the lower surface ofthe display 160, and a portion of the lower surface of the optical layer631 may contact the upper surface the optical layer) of the fingerprintsensor 610. At least one portion of the optical bonding layer 630 may bedisposed between the display 160 of the sensor disposition area 191 andthe fingerprint sensor 610. Accordingly, the optical layer 631 may havea vertical width including the thickness of the protective layer 190_6,the thickness of the digitizer 301_1, and a spacing distance between thedigitizer 301_1 and the fingerprint sensor 610. The optical layer 631 isoperated as a medium having a permittivity that is different from thoseof the display 160 and the fingerprint sensor 610, and accordingly, mayfunction to affix the protective layer 190_6, the digitizer 301_1, andthe fingerprint sensor 610 while being operated such that more light mayenter the fingerprint sensor 610 from the display 160. The heatradiating layer 195 (As shown FIG. 6BA or 6BB) included in theabove-described rear panel 190 may be further disposed under thedigitizer 301_1.

FIGS. 6CA, 6CB, and 6CC are views illustrating a fingerprint sensordisposition structure of an electronic device 600 c according to anembodiment of the present disclosure.

Referring to FIGS. 6CA, 6CB, and 6CC, a configuration of the electronicdevice 600 c may include a display 160, a rear panel 190 (e.g., theprotective layers 193_1 and 193_2 and the heat radiating layers 195_1and 195_2), bonding layers 302_3 and 302_4, and a fingerprint sensor 610(e.g., the fingerprint sensor 180). Additionally or alternatively, theelectronic device 600 c may include an optical bonding layer 630_1disposed between the display 160 and the fingerprint sensor 610. Theprotective layers 193_1 and 193_2 may be separated to be disposed atdifferent locations. For example, the protective layers 193_1 and 193_2(e.g., embossing layers) may be disposed on the heat radiating layers195_1 and 195_2, respectively, and a support layer (e.g., a cushionlayer) may be disposed under the heat radiating layers 195_1 and 195_2,respectively.

FIGS. 6CA, 6CB, and 6CC illustrate only a portion of the sensordisposition area 191 related to sensing of a fingerprint, and asdescribed above in FIG. 6AA, additionally or alternatively, theelectronic device 600 c may further include a bracket having a recess inwhich the fingerprint sensor 180 is accommodated, a printed circuitboard in which a processor that supplies a signal related to driving ofthe fingerprint sensor 610 is accommodated, a battery that supplieselectric power, and a rear cover.

According to various embodiments of the present disclosure, as in FIG.6CA in state 611, the display 160 may include a configuration that isthe same as or similar to the display described above with reference toFIGS. 6AA, 6AB, and 6AC or with reference to FIGS. 6BA, 6BB, and 6BC.For example, the display may include at least one of an externalprotective layer including glass, an optical bonding layer, a polarizerlayer, a touch panel, an optical layer, a display panel, and a designlayer. A hole related to sensing of a fingerprint may be formed at alower portion of one side of the display 160, and a rear panel 190 and afingerprint sensor 610 may be disposed.

The rear panel 190, for example, may include at least one layer of theprotective layer 193_1 and the heat radiating layer 195_1, and mayinclude a hole of a specified size formed in an area corresponding tothe sensor disposition area 191. For example, the hole formed in therear panel 190 may have a size that is not more than the size of thefront surface of the optical layer of the fingerprint sensor 610. Abonding layer 302_3 may be disposed between one side of the rear panel190 and a peripheral area of the fingerprint sensor 610. Accordingly,the fingerprint sensor 610 may be affixed to a lower portion of the rearpanel 190. The bonding layer 302_3 may have a band shape having an emptyarea at the center thereof. The size of the inner hole of the bondinglayer 302_2, for example, may have a size that is not less than the sizeof the hole of the rear panel 190. Accordingly, an air gap 620_1 of aspecified thickness may be formed in the sensor disposition area 191between the lower surface of the display 160 and the upper surface ofthe fingerprint sensor 610. For example, the air gap 620_1 may have athickness including a thickness of the protective layer 193_1 and athickness of the bonding layer 302_3. The sectional area of the air gap620_1 may become larger as it goes from the display 160 towards thefingerprint sensor 610.

According to various embodiments of the present disclosure, as in FIG.6CB in state 613, the rear panel 190_1, for example, may include aprotective layer 193_2 and a heat radiating layer 195_2, and may includea hole of a specified size corresponding to the fingerprint sensor 610.For example, the hole formed in the rear panel 190_1 may have a sizethat is not more than the size of the front surface of the fingerprintsensor 610. A bonding layer 302_4 may be disposed at an inner peripheryof the hole of the rear panel 190_1. The central portion of the bondinglayer 302_4 may have a band shape having an empty area at the centerthereof. Accordingly, an air gap 620_2 corresponding to the thickness ofthe bonding layer 302_4 may be formed between the display and thefingerprint sensor 610.

According to various embodiments of the present disclosure, as in FIG.6CC in state 615, an optical bonding layer 630_1 may be disposed betweenthe display 160 and the fingerprint sensor 610. The optical bondinglayer 630_1 may be uniformly distributed on a front surface of an upperportion of the fingerprint sensor 610. The rear panel 190_1 may includea protective layer 193_2 and a heat radiating layer 195_2. The rearpanel 190_1 may include a hole formed in an area corresponding to thesensor disposition area 191 and having a size that is not less than thesize of the front surface of the fingerprint sensor 610. Accordingly,the fingerprint sensor 610 may be positioned in the interior of the rearpanel 190_1. Accordingly, the hole of the rear panel 190_1 may surrounda peripheral part of the fingerprint sensor 610. As compared with astate in which the display 160 and the fingerprint sensor 610 directlycontact each other, the optical bonding layer 630_1 may be operated suchthat more light may enter the fingerprint sensor from the display 160(or light reflection rate may be reduced).

The fingerprint sensor 610 described above with reference to FIG. 6CA instate 611, FIG. 6CB in state 613, and FIG. 6CC in state 615, asdescribed above in FIGS. 6BA, 6BB, and 6BC may include an optical layer,a die, a sensor bonding layer, a substrate, and a sensor case.

FIG. 7 is a view illustrating a disposition of a wavelength selectionsubstrate of an electronic device 100 according to an embodiment of thepresent disclosure.

Referring to FIG. 7 , the electronic device 100 may include a case 101,a display 160, a wavelength selection substrate 250 a rear panel 190, afingerprint sensor 180, a bracket 240, a printed circuit board 210, abattery 220, and a rear cover 230. The wavelength selection substrate250 may be selectively applied based on a change in a design method. Forexample, the wavelength selection substrate 250 may be removed, and adisposition location thereof may be changed. The wavelength selectionsubstrate 250 may be locally disposed in an area that is smaller thanthe display (e.g., the wavelength selection part 251 in FIG. 8 ), andadditional information, for example, is described below with referenceto FIGS. 8 and 9A.

As described above, the display may include an external protective layer161, a bonding layer 163 (e.g., an OCA), a polarizer layer 164, and adisplay panel 165. At least one portion (e.g., a fingerprintauthentication area in which the fingerprint sensor 180 is disposed) ofthe above-described display 160 may be transparent. Light radiated fromat least one pixel (e.g., pixels disposed in the fingerprintauthentication area or pixels disposed in an area of a specified sizeincluding the fingerprint authentication area) included in the displaypanel 165 of the display 160 may be introduced into the fingerprintsensor 180 after passing through the interior of the transparent display160.

The wavelength selection substrate 250 may be disposed under the displaypanel 165 of the display 160. For example, the wavelength selectionsubstrate 250 may be disposed on a whole lower area (or a whole lowerarea of an active area of the display panel 165, in which pixels aredisposed) of the display panel 165. The wavelength selection substrate250 may include a substrate adapted to transmit a specified frequencyband of a frequency spectrum alight radiated from a light source. Atleast a partial layer of the wavelength selection substrate 250 mayinclude an optical filter layer that may selectively transmit only lightof a specified wavelength band (e.g., a permittivity of a specifiedwavelength of about 90% or more). The optical filter layer may beflexibly or rigidly constituted to have a thickness of 0.15 t (“t” means“millimeter”) by using an optical passive element that passes only lightof a specified wavelength. The optical filter layer, for example, beglass, plastic (e.g., polyethylene terephthalate (PET)), a film, adielectric thin film filter (TFT), or a liquid material (e.g., a blackink layer that may pass light (e.g., near infrared (NIR) ray of aspecified band).

According to an embodiment of the present disclosure, the wavelengthselection substrate 250 may transmit at least some frequency bands (orwavelength bands) corresponding to a visible ray band, a visual rayband, and an infrared ray band. For example, the wavelength selectionsubstrate 250 may transmit a wavelength band of 500 nm to 800 nm, awavelength band of a transmissivity of 3% or more, or a frequency bandof the green series (e.g., a wavelength of about 490 nm to 570 nm).Further, the wavelength selection substrate 250 may transmit evenfrequencies (e.g., red light having a wavelength of about 650 nm to 780nm or NIR having a wavelength of about 780 nm to 1100 nm) correspondingto colors located on the left and right sides of the frequencies ofgreen series in a range. The rear panel 190 disposed under thewavelength selection substrate 250 includes a sensor disposition area191 (e.g., a hole), and accordingly, light of a specified frequencyband, which has passed through the wavelength selection substrate 250,may be delivered to the fingerprint sensor 180 through the sensordisposition area 191. As described above, the wavelength selectionsubstrate 250 may be omitted. Further, a location of the wavelengthselection substrate 250 may be changed to another location.

The rear panel 190 may be disposed under the wavelength selectionsubstrate 250 and may include a sensor disposition area 191. Thefingerprint sensor 180 may be disposed under the sensor disposition area191. Through the sensor disposition area 191, the fingerprint sensor 180may collect at least one portion of the light passing through thedisplay 160.

The fingerprint sensor 180 may be disposed under the rear panel 190, andas illustrated, may be disposed in a sensor accommodating area 241provided on one side of the bracket 240. At least one portion (e.g., thelight receiving unit or the light emitting unit and the light receivingunit that may collect light) of the fingerprint sensor 180 may beexposed through the sensor disposition area 191 of the rear panel 190.

The bracket 240 is disposed under the rear panel 190 to support the rearpanel 190, the display 160, and the like. The printed circuit board 210may be disposed under the bracket 240, and may be electrically connectedto the display and the fingerprint sensor 180. A processor related todriving the display 160 and the fingerprint sensor 180 may beaccommodated in the printed circuit board 210. The battery 220 may bedisposed in a layer that is under the bracket 240 and parallel to theprinted circuit board 210. The rear cover 230 may surround the printedcircuit board 210, the battery 220, and the like.

As described above, in the electronic device 100, the wavelengthselection substrate 250 may be disposed at at least one portion of (in aspecified area or in the whole lower area) of the display 160 to reducethe amount of light of an unintended frequency band, which is introducedinto the fingerprint sensor 180, as compared with the case in which thewavelength selection substrate 250 is not disposed.

FIG. 8 is a view illustrating a disposition of a wavelength selectionsubstrate of an electronic device 100 according to an embodiment of thepresent disclosure.

Referring to FIG. 8 , the electronic device 100 may include a case 101,a display 160 (e.g., external protective layer 161, a bonding layer 163(e.g., an OCA), a polarizer layer 164, and a display panel 165), a rearpanel 190, a wavelength selection unit 251, a fingerprint sensor 180, abracket 240, a printed circuit board 210, a battery 220, and a rearcover 230. The display 160, the rear panel 190, the printed circuitboard 210, the battery 220, and the rear cover 230 may have the sameconfigurations as those of FIG. 4 described above. The wavelengthselection part 251 may have the same material, thickness, or opticalcharacteristics (e.g., by which light of a specified wavelength bandmainly passes the wavelength selection substrate 250 in FIG. 7 describedabove), may have a size that is the same as or similar to the size ofthe fingerprint sensor 180, and may be disposed on the fingerprintsensor 180. Further, the wavelength selection part 251 may have a sizethat is similar to or the same as the size of the sensor dispositionarea 191.

The fingerprint sensor 180, in which the wavelength selection unit 251is disposed on the front surface thereof, may be disposed on one side ofthe bracket 240. For example, the fingerprint sensor 180 may be disposedin a sensor accommodating area 241 provided in the bracket 240.

The bracket 240 may include a sensor accommodating area 241 disposedunder the rear panel 190 and in which the fingerprint sensor 180 isaccommodated on one side thereof. The depth of the sensor accommodatingarea 241 may have a height corresponding to the heights of thefingerprint sensor 180 and the wavelength selection unit 251. In orderto affix the fingerprint sensor 180 to the sensor accommodating area241, a bonding layer may be disposed in at least an area between aninner wall of the sensor accommodating area 241 and the fingerprintsensor 180.

FIG. 9A is a view illustrating a disposition of a wavelength selectionsubstrate of an electronic device 100 according to an embodiment of thepresent disclosure.

Referring to FIG. 9A, the electronic device 100 may include a case 101,a display 160 (e.g., external protective layer 161, a bonding layer 163(e.g., an OCA), a polarizer layer 164, and a display panel 165), a rearpanel 190, a wavelength selection unit 252, a fingerprint sensor 180, abracket 240, a printed circuit board 210, a battery 220, and a rearcover 230. The display 160, the rear panel 190, the bracket 240, theprinted circuit board 210, the battery 220, and the rear cover 230 mayhave the same configurations as those of FIG. 4 described above.

The rear panel 190 may be disposed under the display to protect thedisplay 160 or emit heat generated by the display 160. The rear panel190 may include a sensor disposition area 191 (e.g., a hole) such thatthe fingerprint sensor 180 faces the display 160.

The wavelength selection part 252 may have the same material, thickness,or optical characteristics (e.g., by which light of a specifiedwavelength band mainly passes the wavelength selection substrate 250 inFIG. 7 described above), and may be disposed on one side of the sensordisposition area 191. For example, the wavelength selection unit 252 maybe disposed parallel to the rear panel 190 while being inserted into thesensor disposition area 191. The wavelength selection unit 252 may havea size corresponding to the size of the sensor disposition area 191. Thewavelength selection unit 252 may be affixed to the sensor dispositionarea 191. The size of the sensor disposition area 191 may besubstantially the same as, larger than (e.g., about 20% larger than thesize of the front surface of the fingerprint sensor 180), or smaller(e.g., about 50% to 100% smaller than the size of the front surface ofthe fingerprint sensor) than the size of the front surface of thefingerprint sensor 180. The fingerprint sensor 180 may be disposed underthe sensor disposition area 191 in which the wavelength selection unit252 is disposed. The fingerprint sensor 180 may be accommodated in thesensor accommodating area 241 of the bracket 240. Accordingly, if lightis radiated from a pixel of the display 160, a portion of the lightradiated from the pixel, which corresponds to a frequency of a specifiedband (e.g., green light having a wavelength of about 490 nm to 570 nm,red light having a wavelength of about 650 nm to 780 nm, or NIR having awavelength of about 780 nm to 1100 nm) while passing through thewavelength selection unit 252 disposed in the sensor disposition area191. Some light may be delivered to a light receiving unit of thefingerprint sensor 180.

FIG. 9B is a view illustrating a light path related to fingerprintauthentication according to an embodiment of the present disclosure.

Referring to FIG. 9B, while an object 901 (e.g., a finger) including afingerprint is positioned at a specified point (e.g., an externalprotective layer 161) on the display 160 of the electronic device 100,the light generated by at least one pixel of the display panel 165 maybe radiated upwards with respect to FIG. 9B. The travel direction oflight of the light radiated upwards, which collides with the object 901,may be changed. For example, light of the light radiated from the pixel,which is reflected by the object 901, may travel to an area in which thefingerprint sensor 180 is located. Then, the light reflected by theobject 901 may pass through a first bonding layer 163_1, the polarizerlayer 164, a second bonding layer 163_2, and the display panel 165, andmay be delivered to the fingerprint sensor 180 through a wavelengthselection layer (e.g., the wavelength selection substrate 250 in FIG. 7or the wavelength selection units 251 or 252 in FIGS. 8 and 9A,respectively, described above) and the sensor disposition area 191 ofthe rear panel 190. In this process, light (e.g., a noise source) of awavelength band, which is not used for sensing a fingerprint, of thelight radiated from the pixel is filtered by the wavelength selectionsubstrate 250, and only light of a wavelength used for sensing afingerprint may be delivered by the fingerprint sensor 180. If the lightemitting unit 910 is disposed in the fingerprint sensor 180 and awavelength selection substrate 250 is disposed on the fingerprint sensor180, light of a wavelength band other than a specified wavelength bandis reduced while light radiated from the light emitting unit 910 passesthrough the wavelength selection substrate 250 and is then reflected andreceived by the fingerprint area.

FIG. 10 is an exploded perspective view of an electronic deviceincluding a fingerprint sensor sheet according to an embodiment of thepresent disclosure.

Referring to FIG. 10 , an electronic device 100 may include an externalprotective layer 161, a bonding layer 163, a polarizer layer 164, adisplay panel 165, a fingerprint sensor sheet 185 (e.g., a complementarymetal oxide semiconductor (CMOS) image sensor layer) in which aplurality of fingerprint sensors designed to sense a fingerprint in anarea are disposed, and a rear panel 190. Additionally, the electronicdevice 100 may further include a bracket disposed under the rear panel190, a printed circuit board, a battery, and a rear cover. The externalprotective layer 161, the bonding layer 163, the polarizer layer 164,the display panel 165, and the rear panel 190 may have substantially thesame or similar configurations as those of FIG. 2 described above.

The fingerprint sensor sheet 185 may radiate and receive light relatedto recognition of a fingerprint of a user in a wider area than theabove-described fingerprint sensor 180. In this case, the fingerprintsensor sheet 185 may include a form in which a plurality of fingerprintsensors are disposed in an area having a size that is the same as orsimilar to the size of the display 160. The fingerprint sensor sheet 185may be laminated under the display panel 165. The fingerprint sensorsheet 185 may collect light related to detecting a fingerprint in atleast an area of the whole sheet. The fingerprint sensor sheet 185 maycollect light radiated from a light source and reflected by a part(e.g., a finger) of a body of a user, may generate image informationcorresponding to a fingerprint image based on the collected light, andmay store the image information in an internal memory (or a buffer) ofthe fingerprint sensor 180 such that the image information may be usedby a processor. The fingerprint sensor sheet 185 may collect lightreflected after being radiated from the pixels of the display 160, andmay produce image information corresponding to a fingerprint image basedon the collected light to store the produced image information in aninternal memory (or a buffer) of the fingerprint sensor 180. In aprocess of acquiring the fingerprint image, the fingerprint sensor sheet185 may collect information on a location on the display at which afingerprint image is acquired, and may store the collected locationinformation together, for example, the fingerprint sensor sheet 185 mayacquire image information of an area corresponding to an area touched bya finger or the like corresponding to control of a processor of anelectronic device, and may store the acquired image information in amemory such that the image information may be used by the processor. Inthis case, the fingerprint sensor sheet 185 may acquire and store animage of, for example, a finger related to a fingerprint authenticationoperation, and accordingly, the processor may help determine an approachof the finger at least partially based on the images. When the processordesignates a fingerprint authentication area, the fingerprint sensorsheet 185 may acquire image information acquired only from thecorresponding area and provide the image information to the processor.If the processor identifies an area in which the touch sensor includedin the display 160 senses a touch of a finger, the fingerprint sensorsheet 185 may acquire image information in the corresponding touch areain correspondence to control of the processor. After acquiringinformation corresponding to a fingerprint image, informationcorresponding to a fingerprint image, or location informationcorresponding to a finger or a fingerprint, the fingerprint sensor sheet185 (e.g., the fingerprint sensor 180) may deliver at least one portionof the acquired information to the processor.

FIG. 11A is a view illustrating a pixel structure of an electronicdevice according to an embodiment of the present disclosure. FIG. 11B isa view illustrating a fingerprint sensor in a pixel structure of anelectronic device according to an embodiment of the present disclosure.

Referring to FIGS. 11A and 11B, the pixel structure of a display (e.g.,display 160 described above), for example, may include a plurality ofsub-pixels 1101R, 1101G, and 1101B, signal lines 1103 and 1105connecting the sub-pixels 1101R, 1101G, and 1101B, and semi-transparentareas 1107 having a specified transparency. For example, the pluralityof sub-pixels 1101R, 1101G, and 1101B may include a red sub-pixel 1101R,a blue sub-pixel 1101B, and a green sub-pixel 1101G. The red sub-pixel1101R, the blue sub-pixel 1101B, and the two green sub-pixel 1101G maybe operated as one pixel.

The signal lines 1103 and 1105, for example, may be a display line forcontrolling radiating light by the sub-pixels, and a touch line relatedto sensing of a touch, accordingly. An area in which the sub-pixels1101R, 1101G, and 1101B and the signal lines 1103 and 1105 are notdisposed may be semi-transparent area 1107. Through the semi-transparentarea 1107, light radiated from the sub-pixels 1101R, 1101G, and 1101Bmay be delivered to a fingerprint sensor 180 disposed on a rear surfaceof a display. The light of the pixels disposed in the fingerprintauthentication area in which the fingerprint sensor 180 is located orthe light of the pixels of a peripheral area of the fingerprintauthentication area may be introduced to the fingerprint sensor 180through the transparent area 1107 between the signal lines 1103 and1105.

FIGS. 12AA, 12AB, and 12AC are views illustrating changing a touchsensitivity of an electronic device according to an embodiment of thepresent disclosure.

Referring to FIGS. 12AA, 12AB, and 12AC, the electronic device (e.g., anelectronic device 100 described above) may include a display area 1210,a front non-display area 1211, and a fingerprint authentication area1220 in which the fingerprint sensor 180 for fingerprint authenticationis disposed. Further, the electronic device may include a rearnon-display area 1212 and a rear area 1213. At least one of thefingerprint sensors 1257 (e.g., the fingerprint sensor 180 and thepressure sensor 1259) may be disposed under a display (e.g., a display160 described above) of the fingerprint authentication area 1220 of thedisplay area 1210. The size of the fingerprint authentication area 1220may correspond to a size by which the fingerprint sensor 1257 may verifya fingerprint. For example, when the fingerprint sensor 180 acquires afingerprint image of a relatively wide area, the size of the fingerprintauthentication area 1220 may be defined to be larger, The information ofa location at which the fingerprint authentication area 1220 is disposedon the display area 1210 may be stored in a memory of the electronicdevice to be managed.

The display disposed in the display area 1210 and the fingerprintauthentication area 1220 may include a touch sensor. Accordingly, thedisplay area 1210 and the fingerprint authentication area 1220 maycollect information on a touch event based on an approach of an object.

A processor of the electronic device may change a color and a brightnessof a fingerprint recognition area in correspondence to satisfaction of aspecified condition. For example, the processor may change at least oneof a color and a brightness of the fingerprint recognition area to aspecified form if an object contacts (e.g., touches) an upper side ofthe display. The fingerprint recognition area is an area on the displaycorresponding to the sensor disposition area in which the fingerprintsensor 180 related to recognition of a fingerprint, and may include atleast an area of external glass under which the fingerprint sensor 180is disposed, among the area of the display which a fingerprint of theuser contacts. The fingerprint recognition area is an area in which thefingerprint of the user contacts an upper side of the display, and thesensor disposition area described in the following may correspond to thefingerprint recognition area and may include an area (e.g., at least oneportion of a rear panel or at least one portion of a bracket) in whichthe fingerprint sensor for recognizing the fingerprint is disposed.

According to various embodiments of the present disclosure, a processor(e.g., the processor 120 described above) may change at least one of acolor and a brightness of the fingerprint recognition area after apressure of a touch is recognized. For example, if a touch input havinga pressure of a specified value or more is made on the display, theprocessor may change at least one of the color and the brightness of thefingerprint recognition area in correspondence to the input. In thisregard, a pressure sensor 1259 may be disposed under the fingerprintauthentication area 1220 of the display.

According to an embodiment of the present disclosure, if a touch havinga pressure of a specified value or more is made while the display isturned off, the processor may convert the electronic device into aninsertion state (e.g., supply electrical power to the display 160) andprovide an unlock function based on the authentication of thefingerprint. In this operation, the processor may change at least one ofa color and a brightness of the fingerprint recognition area or mayoutput a haptic feedback of a specified pattern in correspondence to thepressure touch.

According to various embodiments of the present disclosure, theprocessor may detect an approach of a finger through touch hovering toimprove fingerprint recognition speed, and when the fingerprintapproaches the display within a specified distance, may perform ahigh-luminance mode (or control light emission of a pixel or a lightemitting unit such that luminance having a specified value or more maybe provided to the fingerprint recognition area). The processor mayimprove power consumption by not adjusting the brightness of thefingerprint recognition area to a specified color and a specifiedbrightness in relation to the recognition of the fingerprint.

According to various embodiments of the present disclosure, if aspecified touch event occurs in a specified area of the display area1210 or the fingerprint authentication area 1220 while an applicationrelated to fingerprint authentication is executed, the processor of theelectronic device may change the color and the luminance of the area (orthe fingerprint authentication area 1220) in which the touch eventoccurs to a specified color and a luminance. The specified color may bea color of a wavelength band that is relatively advantageous forfingerprint authentication. If the fingerprint authentication iscompleted, the processor may restore the color of the area in which thetouch event occurs to a color before the occurrence of the touch.

According to an embodiment of the present disclosure, the touch sensordisposed in the fingerprint authentication area 1220 may adjust thetouch sensitivity in correspondence to control of the processor. Forexample, the touch sensitivity of the fingerprint authentication area1220 may be adjusted more precisely while the fingerprint authenticationis requested. In this case, the processor of the electronic device mayadjust the touch sensitivity of the whole area of the display moreprecisely than in the previous state, or may adjust the touchsensitivity of an area including the fingerprint authentication area1220 more precisely. A hovering signal (or a hovering signal detected asan object approaches the display) generated in the fingerprintauthentication area 1220 may be delivered to the processor.

For example, a request for authentication of a fingerprint is made, theelectronic device may adjust a touch sensitivity of the entire displaymore precisely (or higher) to provide a touch hovering state (e.g., astate in which an approach of a finger within a specified distance froma surface of the display may be detected) corresponding to a specifiedmagnitude. Further, the electronic device may provide a state in which acontact (or touch) of a finger with the surface of the display may bedetected with higher sensitivity. Further, if a request forauthentication of a fingerprint is made, the electronic device mayadjust the sensitivity of the pressure sensor. The electronic device maydetect whether a touch having a pressure of a specified value is mademore minutely, by adjusting the pressure sensor. If a signal (e.g., atouch signal, a pressure signal, and a hovering signal) due to theapproach (e.g., a finger touch of a user, a pressure touch having aspecified value, or hovering) of an object is generated in thefingerprint authentication area 1220 of the display, the electronicdevice may change the color and luminance of the fingerprintauthentication area 1220 based on the signal. The electronic device maychange the color of the fingerprint authentication area 1220 to a colorof a specified wavelength band (e.g., at least one of green light of awavelength of about 490 nm to 570 nm, red light of a wavelength of 650nm to 780 nm, or NIR of a wavelength of 780 nm to 1100 nm). Further, theelectronic device may change the luminance of the fingerprintauthentication area 1220 to a specified luminance (e.g., not less than600 nit). If the hovering signal is removed (or the touch is released orthe pressure touch having a pressure of a specified value is released),the electronic device may restore the color of the corresponding area toa color before the generation of the hovering signal (or the touch orthe pressure touch). If the hovering signal is removed, the electronicdevice may restore the luminance of the corresponding area to aluminance before the generation of the hovering signal. When a touchsignal is generated in an area in which the hovering signal isgenerated, the electronic device may maintain the currently displayedcolor. If the touch signal is released or the fingerprint authenticationis completed, the electronic device may restore the touch sensitivity toan original state (a state before the request for the fingerprintauthentication). Further, if the touch signal is released or thefingerprint authentication is completed, the electronic device mayrestore the changed color to a color before the request for thefingerprint authentication.

According to various embodiments of the present disclosure, theprocessor of the electronic device may adjust the touch sensitivity ofthe fingerprint authentication area 1220 more precisely than in theperipheral area or than in the previous state. If a specified hoveringsignal is detected in the fingerprint authentication area 1220, theprocessor may allow the fingerprint authentication area 1220 to displayone of a specified luminance and a specified color. If the fingerprintauthentication is completed, the processor may allow the fingerprintauthentication area 1220 to return to a state before the fingerprintauthentication operation or a state before the generation of thehovering signal. The processor may change at least one of the luminanceand the color of the fingerprint authentication area 1220 incorrespondence to occurrence of a specified event (e.g., occurrence of atouch event or a finger approach recognition event).

In consideration of the rear surface of the electronic device, inrelation to the driving of the display, an extension area 1261 extendingfrom the display to be bent towards the rear side of the electronicdevice, a display FPCB 1253 connected to the extension area 1261, and adisplay connector 1255 for connecting the display FPCB 1253 to theprinted circuit board may be disposed. The fingerprint sensor 1257 andthe pressure sensor 1259 may be disposed on the display FPCB 1253.Additionally or alternatively, a driving IC 1251 (e.g., a fingerprintsensor IC and a pressure sensor IC) for driving the fingerprint sensor1257 and the pressure sensor 1259 may be disposed on the display FPCB1253. The rear surface is an area corresponding to the rear surface ofthe display, and the rear area 1213, for example, may be at least oneportion of the above-described rear panel or may be at least one portionof the bracket positioned in the rear area 1213.

FIG. 12B is a flowchart of a method of operating an electronic device inrelation to recognition of a fingerprint according to an embodiment ofthe present disclosure.

Referring to FIG. 12B, in relation to the method for operating anelectronic device related to recognition of a fingerprint, in step 1231,the display may maintain a turned-off state according to settings. Instep 1233, the electronic device may activate a touch function of thefingerprint recognition area. In the step 1233, the electronic device(e.g., a processor or the low-power processor) may activate a touchfunction of the fingerprint recognition area based on an always-on touch(AOT) function.

In step 1235, the electronic device may identify whether a touch isdetected. If there is no touch, the electronic device 100 may return tostep 1231. Further, the electronic device 100 may return to step 1233 tomaintain the AOT state. If a touch is detected, in step 1237, theelectronic device 100 (e.g., the low-power processor) may wake up an AP(or a processor) or a fingerprint sensor. In step 1237, the touch sensorprovides an interrupt to the AP and the fingerprint sensor and the APand the fingerprint sensor may be activated in correspondence to theinterrupt.

In step 1239, the processor may display a screen (e.g., a lock screen)on the display. In step 1241, the processor may identify whether a touchis maintained for a specified period of time. If a touch is notmaintained for a specified period of time, the processor may proceed toa step before step 1231 or step 1233. In step 1241, the processor maytransit to a low power or sleep state, and the low-power processor (or asensor hub) may maintain an AOT function of the electronic device.

If the touch is maintained for a specified period of time, in step 1243,the processor may display a specified luminance and a specified color inthe fingerprint recognition area. For example, the processor may controlat least one pixel or control a light emitting unit included in thefingerprint sensor such that the at least one pixel or the lightemitting unit may output green light of 600 nit or more. In step 1245,the processor may capture a fingerprint image through the fingerprintsensor.

In step 1247, the processor may identify whether the registeredfingerprint and the captured fingerprint are the same. If the registeredfingerprint and the captured fingerprint are the same, in step 1249, theprocessor may display a UI that restores the luminance and the color ofthe fingerprint recognition area. In step 1249, the processor mayrelease a locked screen. When the registered fingerprint and thecaptured fingerprint are not the same, in step 1251, the processor maydisplay a UI that restores the luminance and the color of thefingerprint recognition area but maintains the locked screen.

FIG. 12C is a flowchart of a method of operating an electronic device inrelation to recognition of a fingerprint according to an embodiment ofthe present disclosure.

Referring to FIG. 12C, in relation to the method for operating anelectronic device related to recognition of a fingerprint, in step 1261,the display may maintain an off state according to the settings. In step1263, the electronic device may activate a touch of the fingerprintrecognition area. In step 1263, the electronic device (e.g., thelow-power processor) may activate a touch function of the fingerprintrecognition area based on an AOT function.

In step 1265, the electronic may identify whether a touch and a pressureof a specified value are detected. If there is neither a touch nor apressure of a specified value, the electronic device may return to step1261. Further, the electronic device may return to step 1263 to maintainthe AOT state. If a touch and a pressure of a specified value isdetected, in step 1267, the electronic device (e.g., the low-powerprocessor) may wake up an AP (or a processor) or a fingerprint sensor.In step 1267, the touch sensor provides an interrupt to the AP and thefingerprint sensor and the AP and the fingerprint sensor may beactivated in correspondence to the interrupt.

In step 1269, the processor may display a screen (e.g., a lock screen)on the display. In step 1271, the processor may identify whether thetouch and the pressure of a specified value are maintained for aspecified period of time. If the touch and the pressure are notmaintained for a specified period of time, the processor may proceed toa step before step 1261 or step 1263. In step 1271, the processor maytransit to a sleep state, and the low-power processor (or a sensor hub)may maintain an AOT function of the electronic device.

When the touch and the pressure are maintained for a specified period oftime, in step 1273, the processor may display a specified luminance anda specified color in the fingerprint recognition area. For example, theprocessor may control at least one pixel or control a light emittingunit included in the fingerprint sensor such that the at least one pixelor the light emitting unit may output green light of 600 nit or more. Instep 1275, the processor may capture a fingerprint image through thefingerprint sensor.

In step 1277, the processor may identify whether the registeredfingerprint and the captured fingerprint are the same. If the registeredfingerprint and the captured fingerprint are the same, in step 1279, theprocessor may display a UI that restores the luminance and the color ofthe fingerprint recognition area. In step 1279, the processor mayrelease a locked screen. If the registered fingerprint and the capturedfingerprint are not the same, in step 1281, the processor may display aUI that restores the luminance and the color of the fingerprintrecognition area but maintain the locked screen.

FIG. 13 is an electronic device operating environment according to anembodiment of the present disclosure.

Referring to FIG. 13 , an electronic device 100 in a network environmentaccording to various embodiments is described below. The electronicdevice 100 may include a bus 110, a processor 120, a memory 130, aninput/output interface 150, a display 160, a communication interface170, a haptic part 1300, and a fingerprint sensor 180. The electronicdevice 100 may exclude at least one of the elements or may additionallyinclude another element. The display 160 may include a DDI 169, at leastone of a touch panel and a touch IC or a pressure sensor and a sensorIC.

The bus 110 may include, for example, a circuit that connects thecomponents 120 to 180 and 1300 and transfers communications (e.g.,control messages and/or data) between the components.

The processor 120 may include one or more of a CPU, an AP, or acommunication processor (CP). The processor 120, for example, mayexecute operations or data processing related to the control and/orcommunication of at least one other component of the electronic device100. The processor 120 may perform processing related to an operation ofa fingerprint authentication area and fingerprint authentication. Iffingerprint authentication is requested (e.g., an application related tofingerprint authentication is executed), the processor 120 may output aspecified fingerprint authentication guide UI on the display 160. Thefingerprint authentication guide UI may include visual information(e.g., a text or an image) that indicates an area of the display 160,which a finger of the user is to contact. After the fingerprintauthentication guide UI is output, the processor 120 may identifywhether a specified event (e.g., a touch event, a pressure touch event,a hovering event, or a finger approach recognition event) occurs. If aspecified event occurs, the processor 120 may change the display stateof the fingerprint authentication area to a state having at least one ofa specified luminance or a specified color. If the fingerprintauthentication succeeds, the processor 120 may process a function basedon the success of the fingerprint authentication. The processor 120 mayrequest changes of the fingerprint authentication guide UI and thedisplay state of the fingerprint authentication area from the DDI 169.

According to various embodiments of the present disclosure, if anapplication related to the fingerprint authentication is executed, theprocessor 120 may output a predefined area (e.g., an area of the display160, for example, an area in which a card image is displayed). Ifcontacting a specified object (e.g., a finger) in the predefined area,the touch sensor may deliver the corresponding coordinate information tothe processor 120. The processor 120 may output a specified UI (e.g., afingerprint authentication guide UI or an area having a specifiedluminance or a specified color) in an area of the display 160corresponding to the corresponding coordinate information.

The memory 130 may include volatile and/or nonvolatile memory. Thememory 130, for example, may store a command or data related to at leastone other component of the electronic device 100. The memory 130 maystore software and/or a program 140. The program 140, for example, mayinclude a kernel 141, middleware 143, an application programminginterface (API) 145, and/or application programming (or an applicationprogram, application, or applications) 147. At least some of the kernel141, the middleware 143, or the API 145 may be referred to as anoperating system (OS). The kernel 141, for example, may control ormanage system resources (e.g., the bus 110, the processor 120, and thememory 130) that are used to execute operations or functions implementedin the other programs (e.g., the middleware 143, the API 145, or theapplications 147). The kernel 141 may provide an interface through whichthe middleware 143, the API 145, or the applications 147 accessindividual components of the electronic device 100 to control or managethe system resources.

The middleware 143, for example, may function as an intermediary thatallows the API 145 or the applications 147 to communicate with thekernel 141 to exchange data. The middleware 143 may process one or morework requests received from the application programs 147, according totheir priorities. For example, the middleware 143 may give a priority,by which a system resource (e.g., the bus 100, the processor 120, or thememory 130) of the electronic device 100 may be used, to at least one ofthe application programs 147 and process the one or more request forwork. The API 145 is an interface used, by the application 147, tocontrol a function provided from the kernel 141 or the middleware 143,and may include, for example, at least one interface or function (e.g.,instruction) for file control, window control, image processing, andtext control. The application 147 may include an application (e.g.,Samsung Pay® or an unlock function) that is necessary for authenticatinga fingerprint.

The memory 130 may store a fingerprint table. The fingerprint table mayinclude a first preset value indicating a first luminance and a firstcolor, a second preset value indicating a second luminance and a secondcolor, a third preset value indicating a third luminance and a thirdcolor, and the like. If the brightness of the display area iscollectively controlled as a whole, the first luminance may correspondto 600 nit, the second luminance may correspond to 500 nit, and thethird luminance may correspond to 400 nit. If the brightness of an areaof the display area corresponding to the fingerprint sensor iscontrolled (only the bright of a partial area of the display iscontrolled), the first luminance may correspond to 1,000 nit, the secondluminance may correspond to 900 nit, and the third luminance maycorrespond to 800 nit. The first color may be a red color, the secondcolor may be a green color, and the third color may be a purple color.The third luminance may have a preset value of 0 nit (e.g., turning-offof the corresponding display area). The preset values may be appliedbased on a success or a failure of the fingerprint authentication.Further, even if a quality of the image provided by the fingerprintsensor 180 is less than or equal to a specified level and thefingerprint authentication fails, the fingerprint table may be used inrelation to a change of the display state of the fingerprintauthentication area.

The processor 120 may control the display state of the fingerprintauthentication area based on a preset value set to a default, and mayadjust the preset value based on the fingerprint table according to afailure of the fingerprint authentication or an acquisition of an imagequality of a specified level or more. The fingerprint table may includea processor fingerprint table operated by the processor and a DDIfingerprint table operated by the DDI 169. The processor fingerprinttable may be used when being adapted to control a display state of thefingerprint authentication area by the processor 120. The DDIfingerprint table may be stored in a memory area (e.g., a dynamic randomaccess memory (DRAM) or a memory for the DDI 169) included in the DDI169, and may be used such that the fingerprint authentication area has aspecified display state in correspondence to the control of the DDI 169.The electronic device 100 may provide a user interface by which the usermay select a preset value, which is to be applied as a default in thefingerprint authentication area, of the preset values included in thefingerprint table.

The input/output interface 150, for example, may deliver commands ordata input from the user or another external device to anotherelement(s) of the electronic device 100, or may output commands or datareceived from another element(s) of the electronic device 100 to theuser or another external device. The input/output interface 150 mayinclude an audio processing module. The audio processing module mayoutput at least one piece of audio information related to an operationof the fingerprint authentication function. For example, the audioprocessing module may output audio information that guides the user tobring a finger into contact with the fingerprint authentication areaduring a fingerprint authentication operation. Further, the audioprocessing module may output audio information to guide the user tomaintain the touch of the finger during the fingerprint authenticationoperation, audio information to guide the user to release the fingertouch, or audio information to provide guidance as to the success orfailure of the fingerprint authentication. The audio processing modulemay help execute the fingerprint authentication function incorrespondence to a user voice input.

According to an embodiment of the present disclosure, the display 160may include a liquid crystal display (LCD), a light emitting diode (LED)display, an organic light emitting diode (OLED) display, a microelectromechanical system (MEMS) display, and an electronic paperdisplay. The display 160, for example, may display various contents(e.g., a text, an image, a video, an icon, and a symbol). The display160 may include a touch screen and receive, for example, a touch, agesture, a proximity, or a hovering input using an electronic pen or theuser's body.

As described above, the display 160 may include a display area in whicha specified screen interface is output, and a fingerprint authenticationarea in which the fingerprint sensor 180 is disposed. As illustrated inFIG. 10 , if the fingerprint sensor 180 is provided in a form of asheet, the whole display area may be the fingerprint authenticationarea. The display 160 may output guide information (or visualinformation) to guide the fingerprint authentication area. The display160 may convert the display state of the display 160 such that thefingerprint authentication area has a specified luminance or a specifiedcolor in correspondence to the control of the processor 120. The display160 may convert the fingerprint authentication area having the specifiedluminance or the specified color to the previous state (e.g., the statebefore the fingerprint authentication area having the specifiedluminance or the specified color) in correspondence to the control ofthe processor 120.

The display 160 may include a DDI 169. The DDI 169 may collect datastored in a frame memory related to driving of the display 160, and mayoutput the collected data on the display 160. The DDI 169 according toan embodiment of the present disclosure may store a guide UI adapted toguide a fingerprint authentication area and a DDI fingerprint table in amemory (e.g., a DRAM or a DDI memory) included in the display 160. TheDDI 169 may output the guide UI stored in the DDI memory in thefingerprint authentication area in correspondence to occurrence of anevent. The DIN 169 may change the display state of the fingerprintauthentication area such that the fingerprint authentication area has afirst luminance and a first color with reference to the DDI fingerprinttable stored in the DDI memory in correspondence to the occurrence ofthe event (e.g., at least one of a hovering event occurring in an areain which the guide UI is output, a touch event, and a finger approachrecognition event) The DDI 169 may change the display state of thefingerprint authentication area such that the fingerprint authenticationarea has a second luminance and a second color in correspondence to anadditional occurring event (e.g., if the quality of a fingerprintauthentication failure event or acquired image information is less thanor equal to a specified value). The hovering event or the touch eventmay be acquired by the touch sensor included in the display 160. Thefinger approach recognition event may be acquired by the fingerprintsensor 180.

The communication interface 170, for example, may set a communicationbetween the electronic device 100 and a first external electronic device102, or a server 106. For example, the communication interface 170 maybe connected to a network 162 through a wireless communication or awired communication to communicate with the external electronic device102 or the server 106.

The wireless communication, for example, may include a cellularcommunication that uses at least one of long-term evolution (LTE),LTE-advanced (ATE-A), 5G, code division multiple access (CDMA), widebandCDMA (WCDMA), a universal mobile telecommunications system (UNITS),wireless broadband (WiBro), or a global system for mobile communications(GSM). The wireless communication, for example, may include at least oneof wireless fidelity (Wi-Fi), Bluetooth (BT), Bluetooth low energy(BLE), Zigbee, NFC, magnetic secure transmission, radio frequency, or abody airless network (BAN) The wireless communication may include GNSS.The GNSS, for example, may be a global positioning system (GPS), aglobal navigation satellite system (Glonass), a Beidou navigationsatellite system (Beidou), or the European global satellite-basednavigation system (Galileo). “GPS” may be interchangeably used with the“GNSS”. The wired communication may include at least one of, forexample, a USB, a high definition multimedia interface (HDMI),recommended standard 232 (RS-232), and a plain old telephone service(POTS). The network 162 may include at least one of communicationnetworks, for example, a computer network (e.g., a local area network(LAN) or a wide area network (WAN)), the Internet, or a telephonenetwork. Further, the electronic device 100 may communicate with anotherelectronic device based on short range communication.

The haptic unit 1300 may output a haptic feedback of the electronicdevice 100 in correspondence to control of the processor 120. The hapticunit 1300 may be disposed in an area that is adjacent to the fingerprintsensor 180 disposed in the display 160. The haptic unit 1300 may outputa haptic feedback (or a vibration pattern) of a specified pattern whilea fingerprint is authenticated through the fingerprint sensor 180.Further, the haptic unit 1300 may output anther haptic feedback by whichit may be distinguished whether the authentication of a fingerprint wassuccessful or failed.

As described above, the processor 120 may include a low-power processorand a general purpose processor, where the low-power processor maysupport an AOT state in which the display 160 performs a touch functionin an off state. Further, if a touch is made to the fingerprintrecognition area in the AOT sate, the low-power processor may controlthe haptic unit 1300 such that a haptic feedback of a specified patternrelated to activation of a fingerprint sensor may be output.

The external electronic device 102 may be a device that is the same asor different from the electronic device 100. According to variousembodiments of the present disclosure, all or some of the operationsexecuted by the electronic device 100 may be executed by another or aplurality of electronic devices (e.g. the electronic devices 102 or theservers 106). If the electronic device 100 executes some functions orservices automatically or upon request, it may request at least somefunctions associated with the functions or services from the electronicdevices 102 or the server 106, in place of or in addition to directlyexecuting the functions or services. The electronic device 102 or theserver 106 may execute a requested function or an additional function,and may transfer the result to the electronic device 100. The electronicdevice 100 may process the received result directly or additionally, andmay provide a requested function or service. To this end, for example,cloud computing, distributed computing, or client-server computingtechnologies may be used.

FIG. 14 is a processor according to an embodiment of the presentdisclosure.

Referring to FIG. 14 , the processor 120 may include a sensor controlunit 121, a display control unit 123, and a fingerprint informationprocessing unit 125.

The sensor control unit 121 may perform control of a sensor related tothe performance of a fingerprint authentication function. If a requestfor fingerprint authentication is made, the sensor control unit 121 mayadjust the sensitivity of the touch sensor. For example, the sensorcontrol unit 121 may identify whether a hovering event based on anapproach of an object occurs by adjusting the touch sensitivity of thefingerprint authentication area. Further, the sensor control unit 121may identify whether a touch event occurs in the fingerprintauthentication area. Further, if a request for fingerprintauthentication occurs, the sensor control unit 121 activates thefingerprint sensor 180, and may determine whether an object such as afinger approaches the fingerprint sensor 180 based on image informationacquired by the fingerprint sensor 180. If at least one of a hoveringevent, a touch event, or a finger approach event occurs, the sensorcontrol unit 121 may deliver the corresponding event to the displaycontrol unit 123. If the state of the fingerprint authentication area ischanged by the display control unit 123, the sensor control unit 121 mayrestore the touch sensor area, of which the sensitivity has beenadjusted, to an original state. Further, if the fingerprintauthentication is completed, the sensor control unit 121 may restore thetouch sensor area, of which the sensitivity has been adjusted, to anoriginal state.

If a request for fingerprint authentication is made, the display controlunit 123 may output a guide UI corresponding to the fingerprintauthentication area. In this regard, the display control unit 123 mayoutput the fingerprint authentication guide UI stored in the memory 130,in the fingerprint authentication area, or may request output of theguide UI from the DDI 169. If an event (e.g., a hovering event, a touchevent, or a finger approach recognition event) is delivered from thesensor control unit 121, the display control unit 123 may display thefingerprint authentication area in a specified display state. Forexample, the display control unit 123 may display the fingerprintauthentication area such that the fingerprint authentication area has afirst luminance (e.g., 600 nit) and a first color (e.g., a green seriescolor). In this case, the display control unit 123 may refer to afingerprint table stored in the memory 130. Further, the display controlunit 123 may request a preset value from the DDI 169 such that thefingerprint authentication area has a first luminance (e.g., 600 nit)and a first color (e.g., green). The DDI 169 may output data, forexample, a display set such that the fingerprint authentication area isdisplayed in a specified display state while referring to the DDIfingerprint table in correspondence to the request of the displaycontrol unit 123.

If the fingerprint authentication fails or the quality of the acquiredimage information is a specified value or less, the display control unit123 may change a display state of the fingerprint authentication area.For example, the display control unit 123 may display the fingerprintauthentication area such that the fingerprint authentication area has asecond luminance (e.g., 1000 nit) and a second color (for example,green). Further, the display control unit 123 may change only theluminance of the fingerprint authentication area. In this regard, thedisplay control unit 123 may refer to a fingerprint table stored in thememory 130. Further, the display control unit 123 may request the DDI169 to change the display state of the fingerprint authentication area.When the fingerprint authentication fails or image information of a lowquality is acquired, the display control unit 123 may output a messageto indicate a failure of the fingerprint verification or a failure inacquisition of a normal image. The display control unit 123 may output aspecified guide message (e.g., a message to maintain a finger contactstate related to redo the acquisition of the fingerprint information ora message to guide adjustment of a contact location of a finger inrelation to acquisition of additional fingerprint information).

If the fingerprint authentication succeeds, the display control unit 123may restore the display state of the fingerprint authentication area toa state before the fingerprint authentication. For example, the displaycontrol unit 123 may remove the fingerprint authentication guide UI orthe display state having a specified luminance and a specified color,and may output a screen based on execution of an application related tothe fingerprint authentication on the display 160.

The fingerprint information processing unit 125 may execute afingerprint authentication application in correspondence to a user inputor an advent of a scheduled event. The fingerprint informationprocessing unit 125 may request activation of the fingerprint sensor 180or adjustment of the sensitivity of the touch sensor from the sensorcontrol unit 121 in correspondence to execution of a fingerprintauthentication application. If the image information is acquired fromthe fingerprint sensor 180, the fingerprint information processing unit125 may process fingerprint authentication by comparing the acquiredfingerprint information and the stored fingerprint information. In thisoperation, the fingerprint information processing unit 125 may requestcomparison of fingerprint information from a separate trustableoperating system environment (e.g., trusted execution environment(TEE)). If the fingerprint authentication fails or the quality of theimage information acquired from the fingerprint authentication area is aspecified value or less, the fingerprint information processing unit 125may request change of a display state of the fingerprint authenticationarea from the display control unit 123. The fingerprint informationprocessing unit 125 may redo the fingerprint authentication based on theimage information acquired by the fingerprint sensor 180 after thedisplay state of the fingerprint authentication area is changed. Thefingerprint information processing unit 125 may perform a comparison offingerprint information a specified number of times, and if thespecified number of times elapses, may determine that the fingerprintauthentication fails. At least one of the luminance and the color of thefingerprint authentication area may be changed for the specified numberof times. If the fingerprint authentication succeeds, the fingerprintinformation processing unit 125 may execute a function based on thesuccess of the fingerprint authentication.

According to various embodiments of the present disclosure, anelectronic device according to an embodiment may include a displayincluding at least one pixel and at least a partial area of which istransparent, a fingerprint sensor disposed in an area of a lower part ofthe display, on which a screen is displayed, and adapted to collectlight radiated from a pixel disposed in the display and a direction ofwhich has been changed by an object that approached an upper side of thedisplay and acquire image information related to authentication of afingerprint, and a processor adapted to control an operation ofacquiring image information of the fingerprint sensor.

According to various embodiments of the present disclosure, anelectronic device may include a display in which a fingerprintrecognition area is formed in at least one portion thereof a fingerprintsensor disposed under the display and adapted to acquire imageinformation to be used for authentication of a fingerprint correspondingto an object that approaches a fingerprint recognition area based atleast partially on a light radiated from at least one pixel of thedisplay and reflected by the object and a processor adapted to controlat least one function of the fingerprint sensor in relation with theacquiring of the image information.

According to various embodiments of the present disclosure, theelectronic device may further include a rear panel formed under thedisplay, the rear panel includes an opening aligned with the fingerprintsensor and the fingerprint recognition area.

According to various embodiments of the present disclosure, the rearpanel includes a protective layer formed adjacent to the display, and atleast one portion of the opening is formed in the protective layer.

According to various embodiments of the present disclosure, the rearpanel further includes a digitizer formed in or under the protectivelayer, and wherein a portion of the opening is formed in the digitizer.

According to various embodiments of the present disclosure, the rearpanel further includes a heat radiating layer formed under thedigitizer.

According to various embodiments of the present disclosure, theelectronic device may further include a bracket disposed under the rearpanel to support the display, the bracket includes a sensoraccommodating area in which at least one portion of the fingerprintsensor is accommodated.

According to various embodiments of the present disclosure, theelectronic device may further include a wavelength selecting elementaligned with the opening and adapted to pass only a portion of thereflected light of having a specified wavelength.

According to various embodiments of the present disclosure, theelectronic device may further include a wavelength selecting elementdisposed between the display and the fingerprint sensor and adapted topass only a portion of the reflected light having a specifiedwavelength.

According to various embodiments of the present disclosure, thefingerprint recognition area occupies substantially an entire area of adisplay area, and the fingerprint sensor is aligned with the fingerprintrecognition area.

According to various embodiments of the present disclosure, theprocessor is further adapted to output a color having a specifiedwavelength via the fingerprint recognition area in response to a requestto authenticate the fingerprint.

According to various embodiments, of the present disclosure theprocessor may be adapted to output a specified luminance via thefingerprint recognition area in response to a request to authenticatethe fingerprint.

According to various embodiments of the present disclosure, theprocessor may be adapted to control the fingerprint recognition areabased at least in part on a first display attribute in relation with theacquiring of the image information and control the fingerprintrecognition area based at least in part on a second display attribute ifthe acquired image information satisfies a specified condition.

According to various embodiments of the present disclosure, theprocessor may be adapted to adjust a color or a luminance as at leastpart of the controlling the fingerprint recognition area based at leastin part on the second display attribute.

According to various embodiments of the present disclosure, theprocessor may be adapted to output, via the display, a user interface toguide the approaching of the object to the fingerprint recognition areain response to the request to authenticate the fingerprint.

According to various embodiments of the present disclosure, theprocessor may be adapted to control the fingerprint recognition areabased at least in part on a first touch sensitivity and control aperipheral area of the fingerprint recognition area of the display basedat least in part on a second touch sensitivity.

According to various embodiments of the present disclosure, theprocessor may be adapted to output a specified luminance, or a colorhaving a specified wavelength via the fingerprint recognition area if ahovering input is detected with respect to the approaching of the objectto the fingerprint recognition area based at least in part on the firsttouch sensitivity.

According to various embodiments of the present disclosure, thefingerprint sensor is in contact with a lower surface of the displaycorresponding to the fingerprint recognition area.

According to various embodiments of the present disclosure, an opticalbonding layer is formed in at least one portion of the opening. Thefingerprint sensor may be disposed in a form of a sheet such that afingerprint may be recognized in a whole active area of the display, onwhich a screen is displayed.

According to various embodiments of the present disclosure, when arequest for authentication of a finger is made, the processor may outputat least one portion of the display in a color of a specified wavelengthband selected from various wavelength bands, such as 650 to 780 nm, 490to 570 nm, or 780 to 1100 nm.

According to various embodiments of the present disclosure, theprocessor may output a fingerprint authentication area of the displaycorresponding to the area in which the fingerprint sensor is disposed,in a color of a specified wavelength band selected from variouswavelength bands, such as 650 to 780 nm, 490 to 570 nm, or 780 to 1100nm.

According to various embodiments of the present disclosure, when thefinger verification fails or acquisition of image information having aquality of a specified value or more fails, the processor outputs adisplay state of a display area in which the object in contact isdisposed differently from the previous state.

According to various embodiments of the present disclosure, theprocessor may process such that a luminance of a display area in whichan object in contact is disposed increases by a specified value (e.g.,300 to 1000 nit, for example, 600 nit or 1000 nit).

According to various embodiments of the present disclosure, theprocessor may output a guide UI to guide disposition of a user finger inthe fingerprint authentication area of the display corresponding to anarea in which the fingerprint sensor is disposed, based on the requestfor the fingerprint authentication. The processor may output a hapticfeedback when recognition of a fingerprint is started or completed. Theprocessor may output a haptic feedback based on a success of recognitionof a fingerprint and a haptic feedback based on a failure of recognitionof a fingerprint in different patterns.

According to various embodiments of the present disclosure, if a touchsignal is detected in the fingerprint authentication area, the processormay output the fingerprint authentication area in a color of a specifiedwavelength band (e.g., 490 nm to 570 nm, 650 nm to 780 nm, 780 nm to1100 nm, or 500 nm to 800 nm) of a specified luminance (e.g., not lessthan 600 nit).

According to various embodiments of the present disclosure, if a touchsignal is detected in the fingerprint authentication area, the processormay output the fingerprint authentication area in a color of a specifiedwavelength band (e.g., 490 nm to 570 nm, 650 nm to 780 nm, 780 nm to1100 nm, or 500 nm to 800 nm) of a specified luminance (e.g., not lessthan 600 nit).

According to various embodiments of the present disclosure, theprocessor may process the touch sensitivity of the fingerprintauthentication area differently from a peripheral portion to detect ahovering signal.

According to various embodiments of the present disclosure, if ahovering signal is received in the fingerprint authentication area, theprocessor may output the fingerprint authentication area in a color of aspecified wavelength band (e.g., 490 nm to 570 nm, 650 nm to 780 nm, 780nm to 1100 nm, or 500 nm to 800 nm) of a specified luminance (e.g., notless than 600 nit).

According to various embodiments of the present disclosure, when arequest for authentication of a fingerprint is made, the processor mayrecognize approach of a finger based on the image information acquiredby the fingerprint sensor, and if the approach of the finger isrecognized, may output the area in which the finger is recognized, in acolor of a specified wavelength band (e.g., 490 nm to 570 nm, 650 nm to780 nm, 780 nm to 1100 nm, or 500 nm to 800 nm) of a specified luminance(e.g., not less than 600 nit).

According to various embodiments of the present disclosure, theprocessor may output a guide UI to guide disposition of a user finger inthe fingerprint authentication area of the display corresponding to anarea in which the fingerprint sensor is disposed, based on the requestfor the fingerprint authentication.

According to various embodiments of the present disclosure, theelectronic device may further include at least one of a first bondinglayer (302_4 of FIG. 6CB) disposed between the fingerprint sensor andthe display, a second bonding layer (302_1 of FIG. 6BA) disposed betweenthe fingerprint sensor and the digitizer, and a third bonding layer(302_2 of FIG. 6BB) disposed between the fingerprint sensor and theprotective layer.

According to various embodiments of the present disclosure, theelectronic device may further include at least one of an air gap formedbetween a lower surface of the display and the fingerprint sensor, andan optical bonding layer disposed between the lower surface of thedisplay and the fingerprint sensor.

According to various embodiments of the present disclosure, theelectronic device may further include any one of a display panelextension extending from one side of the display, disposed on a rearsurface of the display area of the display to be curved, and in which adisplay driving module is mounted on one side thereof, and a displaypanel connector electrically connected to an end of one side of thedisplay and disposed on the rear surface of the display area of thedisplay to be curved, and in which a display driving module is mountedon one side thereof.

According to various embodiments of the present disclosure, thedigitizer may be disposed between the display and the rear panel.

According to various embodiments of the present disclosure, theprocessor may be adapted to control the fingerprint recognition areabased on a first display attribute (e.g., a luminance, a color, and apattern form of the display) in relation to the operation of acquiringthe image information, and may be adapted to control the fingerprintrecognition area based on a second display attribute when the acquiredimage information satisfies a specified condition (e.g., when the imageinformation has a resolution of a specified value or less or has a lowcontrast or an image having .a quality that is necessary for recognitionof a fingerprint is not acquired).

According to various embodiments of the present disclosure, theelectronic device according to an embodiment may include a fingerprintsensor, a display including a fingerprint recognition area, and aprocessor, and the processor may be adapted to receive a request forauthentication of a fingerprint, output a user interface for guidingapproach of an object to the fingerprint recognition area through thedisplay in response to the request, and adjust at least one displayattribute for the fingerprint recognition area at least partially basedon occurrence of a specified event related to the approach of theobject.

According to various embodiments of the present disclosure, theprocessor may be adapted to radiate light used for acquiring imageinformation of the object by using at least one pixel corresponding tothe fingerprint recognition area in response to the request.

According to various embodiments of the present disclosure, theelectronic device according to an embodiment may include a fingerprintsensor, a display including a fingerprint recognition area formed in atleast one portion thereof and a processor, the processor may be adaptedto receive a request for authentication of a fingerprint, output a userinterface via the display in response to the request, the user interfaceto guide an approach of an object to the fingerprint recognition areaand adjust at least one display attribute to be used for the fingerprintrecognition area based at least in part on an occurrence of a specifiedevent with respect to the approach of the object.

According to various embodiments of the present disclosure, theprocessor is adapted to radiate, using at least one pixel of the displaycorresponding to the fingerprint recognition area, a light to be used toacquire image information corresponding to the object based at least inpart on the request.

According to various embodiments of the present disclosure, theprocessor is adapted to output, using at least one pixel of the displaycorresponding to the fingerprint recognition area, a color having aspecified wavelength based at least in part on the request.

According to various embodiments of the present disclosure, theprocessor is adapted to output, using at least one pixel of the displaycorresponding to the fingerprint recognition area, a light having aspecified luminance based at least in part on the request.

According to various embodiments of the present disclosure, theprocessor is adapted to control the fingerprint recognition area basedat least in part on a first display attribute to acquire imageinformation corresponding to the object and control the fingerprintrecognition area based at least in part on a second display attribute ifthe acquired image information satisfies a specified condition.

FIG. 15A is a flowchart of a fingerprint operating method based on achange in a display state value of a fingerprint authentication areaaccording to an embodiment of the present disclosure.

Referring to FIG. 15A, in relation to the fingerprint operating method,in step 1501, if an event occurs, a processor 120 (e.g., the sensorcontrol unit 121) of the electronic device 100 may identify whether theevent is related to a request for fingerprint authentication. If theevent is not related to a request for fingerprint authentication, instep 1503, the processor 120 may execute a function related to theoccurring event. For example, the processor 120 may output a home screenor a webpage in correspondence to the type of the event. Further, theprocessor 120 may execute a communication function based on the event.

If an event related to a request for fingerprint authentication, theprocessor 120 (e.g., the sensor control unit 121) may activate thefingerprint sensor 180. In step 1505, the processor 120 (e.g., thedisplay control unit 123) may output information to guide a fingerprintauthentication area. For example, the processor 120 may output a box ora closed curve to indicate an area in which the user input is to belocated, in a specified area of the display 160. At least one of a textor an image for guiding a contact of a finger may be displayed in theinterior of the box or the closed curve.

In step 1507, the processor 120 (e.g., the sensor control unit 121) mayidentify whether a touch occurs in a specified area (e.g., thefingerprint authentication area). If a touch does not occur, theprocessor 120 branches to step 1501 to identify whether the request forfingerprint authentication is available (e.g., within a specified timeperiod after the request for fingerprint authentication), and mayprocess the step that follows. According to the situation, an operationof inspecting the availability of the request for fingerprintauthentication may be omitted.

If a touch occurs in the fingerprint authentication area, in step 1509,the processor 120 (e.g., the display control unit 123) may change thedisplay state of the fingerprint authentication area such that thefingerprint authentication area has a specified luminance, a specifiedcolor, and a specified phase (or form). For example, the processor 120may process the fingerprint authentication area such that thefingerprint authentication area has a specified luminance and at leastone color. The fingerprint sensor 180 may collect image informationbased on light, which is reflected by a touched object and received bythe fingerprint sensor 180, of the light of the pixels corresponding tothe fingerprint authentication area, and may store the collected imageinformation in a memory such that the processor 120 (e.g., thefingerprint information processing unit 125) may use the imageinformation. The fingerprint information processing unit 125 may performfingerprint authentication based on the received image information. Forexample, the fingerprint information processing unit 125 may compare thefingerprint information stored in advance and the acquired fingerprintinformation, and may identify whether the two pieces of fingerprintinformation coincides with each other by a specified ratio or more.

The specified ratio, for example, may be a ratio of false rejectionratio (FRR) to false acceptance ratio (FAR) (FRR/FAR) of 10% or less(e.g., 3% or less). Further, the specified ratio may be a ratio of FRRof 3% in the case of 1/50000 (FAR). The FAR and the FRR may include areference for measuring a security and a usage of a biometricrecognition security solution.

In step 1509, the fingerprint information processing unit 125 mayextract a feature point of the acquired fingerprint information and maycompare the feature point with a feature point of the fingerprintinformation stored in advance. The fingerprint information, for example,may be compared in a reliable operating system environment (e.g., TEE,trusted zone (TZ), or secure world).

In step 1511, the processor 120 may identify whether an event related tocompletion of the fingerprint authentication function occurs. If anevent related to completion of the fingerprint authentication functionoccurs, the processor 120 may perform processing such that the state ofthe fingerprint authentication area returns to the state beforeexecution of the function or returns to a specified state (e.g., astandby screen display state). In step 1511, the processor 120 (e.g.,the sensor control unit 121) may deactivate the activated fingerprintsensor 180. Further, the processor 120 (e.g., the display control unit123) may restore the fingerprint authentication area having a specifieddisplay state to a previous state. In step 1511, if an event related tocompletion of the fingerprint authentication function does not occur,for example, if the fingerprint authentication fails, the processor 120may be branched to an operation before step 1501 to re-perform the stepsthat follow. Then, the state of the electronic device 100 is a state inwhich a request for fingerprint authentication is available, and may bea state of step 1509 in which the fingerprint authentication area has aspecified luminance and a specified color. In this case, the fingerprintsensor 180 may newly produce image information based on the lightcollected for a specified period of time, and the processor 120 (e.g.,the fingerprint information processing unit 125) may re-performfingerprint authentication based on the produced image information.

According to various embodiments of false acceptance ratio, in step1509, the processor 120 (e.g., the display control unit 123) may changethe display state of the fingerprint authentication area again. Theprocessor 120 may display at least one of the luminance, the color, andthe phase of the fingerprint authentication area different from theprevious state. For example, the processor 120 may process thefingerprint authentication area such that the luminance of thefingerprint authentication area is greater than before. The processor120 may re-perform fingerprint authentication based on image informationcollected based on the light produced according to the relatively highluminance. Further, the processor 120 may adjust a luminance of afingerprint authentication area to a maximum brightness (e.g., isdifferent based on the physical characteristics of the display) that mayexpressed by the display, and may perform authentication of afingerprint based on the adjusted luminance.

FIG. 15B is a view of a screen interface related to a change in adisplay state value of a fingerprint authentication area according to anembodiment of the present disclosure.

Referring to FIG. 15B, the electronic device 100 may output an executionscreen of an application related to fingerprint authentication on thedisplay 160. The electronic device 100 may change a specified area(e.g., a fingerprint authentication area or an area which an objectrelated to fingerprint authentication approaches) such that thespecified area has a specified color. For example, if a touch event (ora hovering event) occurs on an area in which a card image is output inrelation to fingerprint authentication, the electronic device 100 mayoutput any one of a first object 1561, a second object 1562, or a thirdobject 1563.

The first object 1561, for example, may include a central circle and anexternal circle. The central circle may function as a light emittingunit. The external circle may function as a path of light reflected by aridge of a fingerprint and received by the fingerprint sensor. Further,the central circle may function as a path of light reflected by a ridgeof a fingerprint and the external circle may function as a lightemitting unit adapted to radiate light towards the fingerprint,Accordingly, the central circle (e.g., a color of a wavelength of 780 to1100 nm) and the external circle (e.g., a color of a wavelength of 650to 780 nm or 490 to 570 nm) may have colors of different wavelengthbands.

The second object 1562 may include an object having a specified colorcorresponding to a touch area of the user or a hovering area. The secondobject 1562 may be changed based on the size of a touch area of the useror a hovering area. The second object 1562 may have a color of awavelength (e.g., a wavelength of 780 to 1100 nm) that is advantageousfor fingerprint authentication. Although FIG. 15B illustrates that theshape of the second object 1562 is circular, the second object 1562 mayhave an elliptical or polygonal shape in correspondence to the shape ofthe touch area.

The third object 1563 may be an object displayed in the touch area orthe hovering area of the user and including a specified pattern. Thepattern of the third object 1563, for example, may change a path of thelight reflected by a ridge of a fingerprint or the like to a specifiedform. The size and shape of the pattern of the third object 1563 may bechanged based on setting of the user.

FIG. 16 is a flowchart of a hovering signal based fingerprint operatingmethod according to an embodiment of the present disclosure.

Referring to FIG. 16 , in relation to the fingerprint operating method,in step 1601, if an event occurs, a processor 120 (e.g., the sensorcontrol unit 121) of the electronic device 100 may identify whether theevent is an event related to a request of fingerprint authentication. Ifthe event is not an event related to a request of fingerprintauthentication, in step 1603, the processor 120 may execute a functionrelated to the event occurring similarly to step 1503 in FIG. 15Adescribed above.

If an event related to a request of fingerprint authentication occurs,in step 1605 in FIG. 16 , the processor 120 (e.g., the sensor controlunit 121) may adjust the sensitivity of the touch sensor. For example,the processor 120 may increase the sensitivity of the whole touch sensoror increase the touch sensor of the fingerprint authentication area suchthat the touch sensor of the fingerprint authentication area is greaterthan that of the peripheral portion of the fingerprint authenticationarea. The fingerprint authentication area is an area in which thefingerprint sensor 180 is disposed, and the location information of thefingerprint authentication area may be written in the memory 130. Theprocessor 120 may refer to location information of the fingerprintauthentication area written in the memory 130 to process the touchsensitivity of the corresponding area differently from the peripheralarea. Prior to adjustment of the touch sensitivity, the processor 120(e.g., the display control unit 123) may output guide information toguide a fingerprint authentication area on the display 160.

In step 1607, the processor 120 (e.g., the display control unit 121) mayidentify whether a hovering signal is collected. For example, theprocessor 120 may identify whether a specified hovering signal (e.g., ahovering signal based on an approach of a finger) in at least a partialarea of the touch sensor or a specified hovering signal is collected inthe fingerprint authentication area.

If the specified hovering signal is not detected, the processor 120(e.g., the sensor control unit 121) may skip the steps that follow andmay return to step 1615. In step 1615, if an event to indicatecompletion of the fingerprint verification function does not occur, theprocessor 120 may identify whether the request for fingerprintauthentication in step 1601 is available. If the request for fingerprintauthentication is available (e.g., within a preset limit time inrelation to fingerprint authentication), the processor 120 (e.g., thesensor control unit 121) may maintain the touch sensitivity in theprevious state. Further, the processor 120 (e.g., the sensor controlunit 121) may change the sensitivity of the touch sensor such that thesensitivity of the touch sensor is more sensitive than the previousstate. According to the situation, a step of inspecting the availabilityof the request for fingerprint authentication may be omitted.

If a specified hovering signal is collected, in step 1609, the processor120 (e.g., the display control unit 123) may change the display sate ofthe fingerprint authentication area again. The processor 120 may displayat least one of the luminance, the color, and the form of thefingerprint authentication area different from the previous state. Forexample, the processor 120 may process the fingerprint authenticationarea such that the luminance of the fingerprint authentication area isgreater than before. The processor 120 may re-perform fingerprintauthentication based on image information collected based on the lightproduced according to the relatively high luminance.

In step 1611, the processor 120 (e.g., the sensor control unit 121) mayidentify whether a touch occurs in a specified area (e.g., thefingerprint authentication area). When a touch does not occur, theprocessor 120 may be branched to step 1607 to identify whether aspecified hovering signal is collected, and may perform processing basedon the identification.

If a touch occurs in the fingerprint authentication area, in step 1613,the processor 120 (e.g., the display control unit 123) may collect andprocess fingerprint information. The fingerprint sensor 180 may collectimage information based on light, which is reflected by a touched objectand received by the fingerprint sensor 180, of the light of the pixelcorresponding to the fingerprint authentication area, and may deliverthe collected image information to the processor 120 (e.g., thefingerprint information processing unit 125). The processor 120 (e.g.,the fingerprint information processing unit 125) perform fingerprintauthentication based on the received image information, similarly to theprocessing of fingerprint information in step 1509.

In step 1615, the processor 120 may identify whether an event related tocompletion of the fingerprint authentication function occurs. If anevent related to completion of the fingerprint authentication functionoccurs, the processor 120 may perform processing such that the state ofthe fingerprint authentication area returns to the state beforeexecution of the function or is branched to a specified state (e.g., astandby screen display state). In step 1615, the processor 120 (e.g.,the sensor control unit 121) may deactivate the activated fingerprintsensor 180. Further, the processor 120 (e.g., the display control unit123) may restore the fingerprint authentication area having a specifieddisplay state to a previous state. In step 1615, if an event related tocompletion of the fingerprint authentication function does not occur,for example, if the fingerprint authentication fails, the processor 120may be branched to an operation before step 1601 to re-perform the stepsthat follow. Further, if a touch is maintained in step 1611, theprocessor 120 may be branched to step 1613 to re-perform collection andprocessing of fingerprint information. Further, the processor 120 may bebranched to step 1609 to change the display state of the fingerprintauthentication area differently from the previous state, and mayre-perform the steps that follow.

FIG. 17 is a flowchart of a fingerprint operating method using a DDIaccording to an embodiment of the present disclosure.

Referring to FIG. 17 , in relation to a fingerprint operating method, instep 1701, the processor 120 of the electronic device 100 may receiveelectrical power. For example, a user input (e.g., a physical buttoninput) is made while electric power is turned off, the electronic device100 may be booted by using electrical power stored in a battery. Afterbooting is completed or as in step 1703 during the booting, theprocessor 120 (e.g., the display control unit 123) may perform writingof a DDI fingerprint table. For example, the processor 120 may write aDDI fingerprint table stored in the memory 130 (e.g., an embeddedmultimedia card eMMC or a universal flash storage (UFS) device) in a DDIRAM.

In step 1705, the processor 120 (e.g., the sensor control unit 121, thedisplay control unit 123, or the fingerprint information processing unit125) may identify whether the fingerprint authentication function isexecuted. If there is no request for execution of a fingerprintauthentication function, the processor 120 may perform a specifiedfunction based on occurrence of an event in step 1707. In this case, theprocessor 120 may execute at least one application related to afingerprint authentication function in correspondence to a user input oraccording to an event of specified scheduling information.

If execution of the fingerprint authentication function is requested,the processor 120 (e.g., the sensor control unit 121) may activate thefingerprint sensor 180 and the touch sensor. In step 1709, the processor120 (e.g., the display control unit 123) may control a change of thedisplay state by the DDI. For example, if a touch event at a specifiedlocation (e.g., the fingerprint authentication area) is collected, theprocessor 120 may deliver a change request signal (or the correspondingtouch event) to request a change of the display state to the DDI 169 incorrespondence to the collected touch event. The DDI 169 may outputfingerprint guide information stored in a RAM on the display 160, incorrespondence to reception of the received change request signal (orthe touch event). Further, the DDI 160 may fingerprint guide informationhaving a specified luminance (e.g., 300 nit to 1000 nit, for example,600 nit or 1000 nit) and a specified color (e.g., a color correspondingto at least one of red light of 650 to 780 nm, green light of 490 to 570nm, NIR of 780 to 1100 nm) stored in a RAM on the display 160.

In step 1711, the processor 120 (e.g., the fingerprint informationprocessing unit 125) may collect fingerprint information incorrespondence to a user touch, and may identify whether the collectedfingerprint information is authenticated. If the fingerprintauthentication is normally performed, in step 1713, the processor 120(e.g., the fingerprint information processing unit 125) may process afunction related to the fingerprint authentication.

If the fingerprint authentication fails, in step 1715, the processor 120may identify whether an event related to completion of the fingerprintauthentication function occurs. If an event related to completion of afingerprint authentication function occurs, the processor 120 maycomplete the fingerprint authentication function. If an event related tothe completion of the fingerprint authentication function does notoccur, the processor 120 may return to the steps before step 1709 tore-perform the steps that follow. In the step, the DDI 169 may receive achange request signal from the processor 120 (e.g., the display controlunit 123) in response to a failure of authentication of a fingerprint,and may process the fingerprint recognition area such that thefingerprint recognition area may be displayed in a display state (e.g.,a luminance of 600 nit and the same color or a color corresponding togreen light of 490 to 570 nm or NIR of a wavelength of 780 to 1100 nm)that is different from the previous display state (e.g., a luminance of400 nit and a color of a wavelength of 650 to 780 nm) based on thereceived change request signal. Further, if a specified fingerprintprocessing time (e.g., 1 to 10 seconds, for example, 3 seconds) elapses,the DDI 169 may automatically change the display state of thefingerprint authentication area.

As described above, according to the fingerprint operating method of anembodiment of the present disclosure, the display state of thefingerprint authentication area may be changed more promptly byprocessing the set values, by which the display state of the fingerprintauthentication area may be controlled, directly by the DDI.

According to various embodiments of the present disclosure, thefingerprint operating method of the present disclosure may include anoperation of receiving a request for fingerprint authentication, anoperation of outputting a guide UI adapted to guide a contact of afinger to a fingerprint authentication area of a display correspondingto a location in which a fingerprint sensor is disposed, an operation ofcollecting a specified event in the fingerprint authentication area, bythe fingerprint sensor, an operation of delivering the specified eventto a DDI (e.g., the DDI) adapted to output the guide UI, by thefingerprint sensor, and an operation of changing a display state of thefingerprint authentication area such that the fingerprint authenticationarea has a specified luminance and a specified color in response to thespecified event, by the DDI.

According to various embodiments of the present disclosure, a method foroperating an electronic device may include receiving a request toauthenticate a fingerprint, outputting a user interface (UI) via adisplay in response to the request, the user interface to guide anapproach of an object to a fingerprint recognition area formed in atleast one portion of the display and adjusting at least one displayattribute to be used the fingerprint recognition area based at least inpart on an occurrence of a specified event with respect to the approachof the object.

According to various embodiments of the present disclosure, adjustingthe at least one display attribute comprises radiating, using at leastone pixel of the display corresponding to the fingerprint recognitionarea, a light having a specified luminance or a specified color to beused to acquire image information corresponding to the object.

FIG. 18 is a flowchart of a fingerprint operating method of changing adisplay state value by using a DDI according to an embodiment of thepresent disclosure.

Referring to FIG. 18 , in relation to the fingerprint operating method,as in step 1601 in FIG. 16 described above, in step 1801 in FIG. 18 ,the processor 120 may identify whether an event related to a request forfingerprint authentication occurs. If an event to request fingerprintauthentication does not occur, as in step 1603 in FIG. 16 , in step 1803in FIG. 18 , the processor 120 may execute a specified function.

In step 1805, if a fingerprint authentication request event occurs, theprocessor 120 (e.g., the sensor control unit 121) may activate the touchsensor. The processor 120 (e.g., the display control unit 123) mayoutput a guide UI related to display of the fingerprint authenticationarea.

In step 1807, the processor 120 (e.g., the sensor control unit 121) mayidentify whether a touch is recognized. For example, the processor 120may identify whether a touch input is made in a fingerprintauthentication area. If a touch input is not made, the processor 120 maybe branched to a step before step 1801 to identify whether a request forfingerprint authentication is available, and if the request forfingerprint authentication is available, may perform step 1807 whilemaintaining an activated state of the touch sensor.

If an available touch input is made in the fingerprint authenticationarea, in step 1809, the processor 120 (e.g., the sensor control unit121) may perform a control such that the touch information collected bythe touch sensor may be delivered to the DDI. In this case, the touchsensor and the DDI may have signal lines, through which the touchinformation may be transmitted and received. In step 1809, the processor120 (e.g., the sensor control unit 121) may activate the fingerprintsensor 180.

In step 1811, the DDI 169 may change the display state of thefingerprint authentication area in correspondence to the touchinformation delivered by the touch sensor. For example, the DDI 169 mayradiate light with reference to values set in the DDI fingerprint tablesuch that the fingerprint authentication area has a first luminance, afirst color, and a first form.

In step 1813, the processor 120 (e.g., the fingerprint informationprocessing unit 125) may perform fingerprint authentication and mayidentify whether the collected fingerprint information is available. Ifthe collected fingerprint information is available, in step 1815, theprocessor 120 (e.g., the fingerprint information processing unit 125)may process a function related to the fingerprint authentication. If thefingerprint authentication fails, in step 1817, the processor 120 mayidentify whether the function is completed. If an event related tocompletion of the function does not occur, in step 1811, the processor120 (e.g., the display control unit 123) may request a change of thedisplay state of the fingerprint authentication area from the DDI 169.

As described above, according to the fingerprint operating method of anembodiment of the present disclosure, touch information may be directlydelivered to the DDI to control the display state of the fingerprintauthentication area without the control of the processor 120.Accordingly, the display state of the fingerprint authentication areamay be changed more promptly.

FIG. 19 is a flowchart of a fingerprint operating method of changing adisplay state value by using a fingerprint sensor according to anembodiment of the present disclosure.

Referring to FIG. 19 , and prior to a description of the example, step1901 and step 1903 may be the same as or similar to step 1801 and step1803 in FIG. 18 described above. In step 1905 in FIG. 19 , if afingerprint authentication request event occurs, the processor 120(e.g., the sensor control unit 121) may activate the fingerprint sensor180 and process a guide UI output.

In step 1907, the processor 120 may identify whether the fingerprintsensor 180 receives a signal on an approach of a finger. In this regard,the activated fingerprint sensor 180 may collect light at a specifiedcycle or in real time, and produce image information based on thecollected light to deliver the produced image information to theprocessor 120. Further, the fingerprint sensor 180 may analyze theproduced image information and determine whether the produced imageinformation corresponds to an approach of a finger. In relation toperformance of the above-described operation, the processor 120 mayperform a control such that the pixels disposed in the specified displayarea (e.g., the fingerprint authentication area) radiate light of aspecified luminance and a specified color. The light radiated by thepixels may be condensed by the light receiving unit of the fingerprintsensor 180. Further, the fingerprint sensor 180 may emit light by usingthe light emitting unit and may collect light by using the lightreceiving unit.

If image information corresponding to an approach of a finger is notcollected, the processor 120 may be branched to an operation before step1905 and may re-perform the steps that follow. In this regard, theprocessor 120 may identify an approach of a finger while maintaining theactivated fingerprint sensor. The processor 120 may identify an approachof a finger for a specified time period, and if the specified timeperiod (e.g., 1 to 10 seconds, for example, 3 seconds or 5 seconds)elapses, may determine whether an availability of the fingerprintauthentication is completed.

If an image information corresponding to an approach of a finger isacquired, in step 1909, the processor 120 (e.g., the display controlunit 123) may process a change of the display state of the fingerprintauthentication area by the DDI 169. The fingerprint sensor 180 maydeliver a result based on the analysis of image information (informationdetermined to be an approach of a finger) to the DDI 169, and the DDI169 may process the fingerprint authentication area such that thefingerprint authentication area is in a specified display state based oninformation of the received fingerprint sensor 180.

In step 1911, the processor 120 may identify whether the fingerprintauthentication succeeds. If the fingerprint authentication succeeds, instep 1913, the processor 120 may process a function related to thefingerprint authentication. If the fingerprint authentication fails, instep 1915, the processor 120 may identify whether the fingerprintauthentication function is completed, and if not completed, may bebranched to an operation before step 1905 to re-perform the steps thatfollow.

According to various embodiments of the present disclosure, a method foroperating an electronic device may include an operation of receiving arequest for fingerprint authentication, an operation of outputting aguide UI adapted to guide a contact of a finger to a display areacorresponding to a location in which a fingerprint sensor is disposed,and an operation of, if a specified event related to a fingerprintauthentication area in which the guide UI is output occurs, outputting adisplay state of the fingerprint authentication area with a specifiedluminance and a specified color, by the guide UI.

According to various embodiments of the present disclosure, the methodmay further include, if a specified hovering signal is received from thefingerprint authentication area, outputting a color of a specifiedwavelength (e.g., at least one of a wavelength of red light of 650 to780 nm, a wavelength of green light of 490 to 570 nm, or a wavelength ofNIR of 780 to 1100 nm) of a specified.

According to various embodiments of the present disclosure, the methodmay further include an operation of comparing image information acquiredby the fingerprint sensor and stored fingerprint information, and anoperation of, when the fingerprint authentication fails or acquisitionof image information having a minimum quality of a specified valuefails, outputting the display state of the display area, in which theobject in contact is disposed, differently from the previous state.

According to various embodiments of the present disclosure, the methodmay further include an operation of a guide UI to guide disposition of auser finger in the fingerprint authentication area of the displaycorresponding to an area in which the fingerprint sensor is disposed,based on the request for the fingerprint authentication.

According to various embodiments of the present disclosure, the methodmay further include an operation of processing the touch sensitivity ofthe fingerprint authentication area differently from a peripheralportion.

According to various embodiments of the present disclosure, the methodmay further include, if a specified hovering signal is received from thefingerprint authentication area, outputting a color f a specifiedwavelength (e.g., at least one of a wavelength of red light of 650 to780 nm, a wavelength of green light of 490 to 570 nm, or a wavelength ofNIR of 780 to 1100 nm) of a specified luminance (e.g., one of 300 nit to1000 nit).

According to various embodiments of the present disclosure, the methodmay further include, if a specified touch signal is received from thefingerprint authentication area, outputting a color f a specifiedwavelength (e.g., at least one of a wavelength of red light of 650 to780 nm, a wavelength of green light of 490 to 570 nm, or a wavelength ofNUR of 780 to 1100 nm) of a specified luminance.

According to various embodiments of the present disclosure, the methodmay further include, recognizing approach of a finger based on the imageinformation acquired by the fingerprint sensor, and if the approach ofthe finger is recognized, outputting the area in which the finger isrecognized, in a color of a specified wavelength band (e.g., 490 nm to570 nm, 650 nm to 780 nm, 780 nm to 1100 nm, or 500 nm to 800 nm).

According to various embodiments of the present disclosure, the methodmay further include an operation of increasing the luminance of an areaof the display, which an object contacts, by a specified value.

According to various embodiments of the present disclosure, a method foroperating an electronic device according to an embodiment may include anoperation of receiving a request for fingerprint authentication, anoperation of outputting a guide UI adapted to guide a contact of afinger to a display area corresponding to a location in which afingerprint sensor is disposed, and an operation of, if a specifiedevent related to a fingerprint authentication area in which the guide UIis output occurs, outputting a display state of the fingerprintauthentication area with a specified luminance and a specified color, bythe guide UI.

FIG. 20 is a view of a condensing light waveform according to anembodiment of the present disclosure.

FIG. 21A is a chart of a display state value changing range according toan embodiment of the present disclosure.

FIG. 21B is a chart indicating a specified range of wavelength bandsaccording to an embodiment of the present disclosure.

Referring to FIGS. 20 to 21B, the quality of the fingerprint imagecollected by the fingerprint sensor may be influenced by the diffractionand optical energy of the light input to the fingerprint sensor. Thelight reflected by the fingerprint of the user in contact with thedisplay 160 may diffract incident light when the incident light isprovided to the fingerprint sensor while passing through apertures ofthe wiring lines and the pixels of the display 160. Accordingly, theincident light that passed the apertures may mutually generateconstructive interferences/destructive interferences.

Then, if a diffraction degree is θ, a relationship of Equation (1) for θmay be established as follows.

$\begin{matrix}{{\sin\;\Theta} = \frac{{Wavelength}\mspace{14mu}{of}\mspace{14mu}{incident}\mspace{14mu}{light}}{{Area}\mspace{14mu}{of}\mspace{14mu}{aperture}}} & (1)\end{matrix}$

Accordingly, when the apertures (e.g., transparent areas of the display160) of the electronic device 100 are constant, diffractions becomesevere and constructive interferences/destructive interferences becomesevere if the wavelength of the incident wave is longer, and thus theacquired image quality may deteriorate.

Due to the property of a photodiode, the sensitivity of the fingerprintsensor is determined by energy of incident light, that is, optical poweras illustrated in FIG. 21A, and accordingly, may be related to thewavelength of the incident wave as in Equations (2) to (4) as follows.

$\begin{matrix}{{{Number}\mspace{14mu}{of}\mspace{14mu}{electrons}\mspace{14mu}{generated}\mspace{14mu}{by}\mspace{14mu}{incident}\mspace{14mu}{wave}} = {{Efficiency} \times \frac{{Optical}\mspace{14mu}{power} \times {Wavelength}\mspace{14mu}{of}\mspace{14mu}{incident}\mspace{14mu}{wave}}{{Plank}\mspace{14mu}{constant} \times {Speed}\mspace{14mu}{of}\mspace{14mu}{light}}}} & (2) \\{{Current} = {e \times {Efficiency} \times \frac{{Optical}\mspace{14mu}{power} \times {Wavelength}\mspace{14mu}{of}\mspace{14mu}{incident}\mspace{14mu}{wave}}{{Plank}\mspace{14mu}{constant} \times {Speed}\mspace{14mu}{of}\mspace{14mu}{light}}}} & (3) \\{{{{Sensitvity}\mspace{14mu}{of}\mspace{14mu}{photodiode}} = {\frac{Current}{{Optical}\mspace{14mu}{power}}\mspace{14mu}{or}}}{{{Sensitivity}\mspace{14mu}{of}\mspace{14mu}{photodiode}} = {{Probability}\mspace{14mu}{of}\mspace{14mu}{generating}\mspace{14mu}{electrons}\mspace{14mu}{by}\mspace{14mu}{incident}\mspace{14mu}{photon} \times \frac{{Wavelength}\mspace{14mu}{of}\mspace{14mu}{incident}\mspace{14mu}{wave}}{1.24}}}} & (4)\end{matrix}$

As illustrated, because an amount of generated currents increases as thewavelength of incident wave becomes longer and the sensitivity of thephotodiode increases, it may be advantageous to radiate incident wave ofa specified frequency band to acquire a suitable quality of thefingerprint information. Accordingly, the electronic device may improvea quality of fingerprint information as illustrated in FIG. 21B bycontrolling pixels disposed in the fingerprint authentication area orthe light emitting unit of the fingerprint sensor such that the pixelsdisposed in the fingerprint authentication area or the light emittingunit of the fingerprint sensor may radiate a color of a specifiedwavelength (e.g., at least one of a wavelength of red light of 650 to780 nm, a wavelength of green light of 490 to 570 nm, or a wavelength ofNIR of 780 to 1100 nm) as illustrated in FIG. 21B.

FIG. 22 is a view illustrating a screen interface related to anoperation of an electronic device according to an embodiment of thepresent disclosure.

Referring to FIG. 22 , the display according to an embodiment of thepresent disclosure may output a screen related to a request forfingerprint authentication as in state 2201. For example, if anapplication that is necessary for a fingerprint authentication functionis executed, the display 160 may output a screen to request fingerprintauthentication as illustrated. The screen related to a request forfingerprint authentication, for example, may include a guide UI 2210.The guide UI 2210, for example, may be displayed in a specifiedfingerprint authentication area of the display 160. The specifiedfingerprint authentication area may correspond to a location at which aspecified finger may be located in consideration of a gripped state ofthe electronic device 100. The guide UI 2210, for example, may include acircular periphery, and may include a specified image (e.g., a virtualdefault fingerprint image) inside the circular periphery. The shape andimage contents of the guide UI 2210 may be changed according tosettings.

While the guide UI 2210 is output on the display 160, the processor 120of the electronic device 100 may selectively adjust the sensitivity ofthe touch sensor. For example, the processor 120 may adjust the touchsensitivity (e.g., 5 or less when the entire value of the sensitivity isdefined as 10) of an area including a fingerprint authentication areaoutput by the guide UI 2210 to have a higher sensitivity than theprevious state (e.g., not less than 6). When an object approaches, thetouch area is adjusted to have a higher sensitivity than the previousstate, the touch sensor may acquire a hovering event or the like earlierthan the peripheral area. If the guide UI 2210 is output, the processor120 may determine an approach of a finger by using the fingerprintsensor 180 disposed under the fingerprint authentication area. Theapproach of the finger may include various gesture motions. For example,the gesture motion may include a short touch, a long press, a doubletap, and a force touch motion. The short touch motion may include anoperation of touching a touch object (e.g., a finger) in a touch areawithin 150 ms. The long press motion may include an operation oftouching a touch object in a touch area within 500 ms. The double tabmotion may include an operation of touching a touch object twice in atouch area within 500 ms. The force touch motion may include anoperation of touching a touch area with a pressure of a specified value.

When a finger approaches the fingerprint sensor 180, as in state 2203,the processor 120 may display the fingerprint authentication area in afirst display state 2221. The first display state 2221, for example, mayinclude a state in which the fingerprint authentication area has a firstluminance (e.g., not less than 600 nit) and a color of green series.Further, the processor 120 may display the fingerprint authenticationarea in a second display state 2220 according to settings. The seconddisplay state 2220, for example, may divide the fingerprintauthentication area to two areas, and may include a state in whichdifferent areas have different colors or different luminance. The seconddisplay state 2220 may include a state in which the luminance of thecentral portion is greater than that of the peripheral portion.

In state 2203, if a finger contact occurs (e.g., a touch is recognized),the processor 120 may perform fingerprint authentication based on imageinformation acquired by the fingerprint sensor 180. If the fingerprintauthentication succeeds, as in state 2205, the processor 120 may outputa message related to the success of authentication on the display 160.Further, the processor 120 may execute an application function (e.g.,release of a locked screen, or approval of a payment) based on thesuccess of authentication, and may output a screen corresponding to theapplication function on the display 160.

If the fingerprint authentication fails (or acquisition of imageinformation of a specified resolution or a quality or higher) in state2203, as in state 2207, the processor 120 may output a messagecorresponding to the failure of fingerprint authentication (or a messageindicating that acquisition of image information of a specifiedresolution fails). Further, the processor 120 may output information toguide in repeating fingerprint authentication. The processor 120 maydisplay the display state of the fingerprint authentication area in athird display state 2222 that is different from the previous state. Forexample, the third display state 2222 may include a display state inwhich at least one of a luminance or a color of the first display state2221 is different. Further, the third display state 2222 may include astate in which a color (e.g., green series) having a luminance that isgreater than the luminance of the first display state 2221 is output.The processor 120 may perform a control such that image information isacquired by using the fingerprint sensor 180 if the fingerprintauthentication area is in the third display state 2222, and mayre-perform fingerprint authentication for the acquired fingerprintinformation. The processor 120 may repeat the fingerprint authenticationoperation a specified number of times.

FIG. 23 is a block diagram of an electronic device 2301 according to anembodiment of the present disclosure.

Referring to FIG. 23 , the electronic device 2301 may include, forexample, all or part of an electronic device 100 shown in FIGS. 1 and 13described above. The electronic device 2301 in FIG. 23 may include oneor more processors 2310 (e.g., application processors APs)), acommunication module 2320, a subscriber identification module (SIM)2329, a memory 2330, a security module 2336, a sensor module 2340, aninput device 2350, a display 2360, an interface 2370, an audio module2380, a camera module 2391, a power management module 2395, a battery2396, an indicator 2397, and a motor 2398.

The processor 2310 may operate or drive, for example, an OS or anapplication program to control a plurality of hardware or softwarecomponents connected thereto and may process and compute a variety ofdata. The processor 2310 may be implemented with, for example, a systemon chip (SoC). The processor 2310 may include a graphics processing unit(GPU) and/or an image signal processor. The processor 2310 may includeat least some (e.g., a cellular module 2321) of the components shown inFIG. 23 . The processor 2310 may load a command or data received from atleast one of other components (e.g., a non-volatile memory) into avolatile memory to process the data and may store various data in anon-volatile memory.

The communication module 2320 may have the same or similar configurationto a communication interface 170 of FIG. 13 described above. Thecommunication module 2320 in FIG. 23 may include, for example, thecellular module 2321, a Wi-Fi module 2322, a BT module 2323, a globalnavigation satellite system (GNSS) module 2324 (e.g., a GPS module, aGlonass module, a Beidou module, or a Galileo module), an NFC module2325, an MST module 2326, and a radio frequency (RF) module 2327.

The cellular module 2321 may provide, for example, a voice call service,a video call service, a text message service, or an Internet service,and the like through a communication network. The cellular module 2321may identify and authenticate the electronic device 2301 in acommunication network using the SIM 2329 (e.g., a SIM card). Thecellular module 2321 may perform at least part of functions which may beprovided by the processor 2310. The cellular module 2321 may include aCP.

The Wi-Fi module 2322, the BT module 2323, the GNSS module 2324, the NFCmodule 2325, and the MST module 2326 may include, for example, aprocessor for processing data transmitted and received through thecorresponding module. At least some (e.g., two or more) of the cellularmodule 2321, the Wi-Fi module 2322, the BT module 2323, the GNSS module2324, the NFC module 2325, and the MST module 2326 may be included inone IC or one IC package.

The RF module 2327 may transmit and receive, for example, acommunication signal (e.g., an RF signal). The RF module 2327 mayinclude, for example, a transceiver, a power amplifier module (PAM), afrequency filter, a low noise amplifier (INA), an antenna, and the like.At least one of the cellular module 2321, the Wi-Fi module 2322, the BTmodule 2323, the GNSS module 2324, the NFC module 2325, and the MSTmodule 2326 may transmit and receive an RF signal through a separate RFmodule.

The SIM 2329 may include, for example, a card which includes a SIMand/or an embedded SIM. The SIM 2329 may include unique identificationinformation (e.g., an integrated circuit card identifier (ICCID)) orsubscriber information (e.g., an international mobile subscriberidentity (IMSI)).

The memory 2330 (e.g., a memory 130 of FIG. 13 described above) mayinclude, for example, an embedded memory 2332 or an external memory2334. The embedded memory 2332 may include at least one of, for example,a volatile memory (e.g., a DRAM, a static RAM (SRAM), a synchronous DRAM(SDRAM), and the like), or a non-volatile memory (e.g., a one-timeprogrammable read only memory (OTPROM), a programmable ROM (PROM), anerasable and programmable ROM (EPROM), an electrically erasable andprogrammable ROM (EEPROM), a mask ROM, a flash ROM, a flash memory(e.g., a NAND flash memory, a NOR flash memory, and the like), a harddrive, or a solid state drive (SSD)).

The external memory 2334 may include a flash drive, for example, acompact flash (CF) drive, a secure digital (SD) card, a micro-SD card, amini-SD card, an extreme digital (xD) card, a multimedia card (MMC), amemory stick, and the like. The external memory 2334 may operativelyand/or physically connect with the electronic device 2301 throughvarious interfaces.

The security module 2336 may be a module which has a relatively highersecure level than the memory 2330 and may be a circuit which storessecure data and guarantees a protected execution environment. Thesecurity module 2336 may be implemented with a separate circuit and mayinclude a separate processor. The security module 2336 may include, forexample, an embedded secure element (eSE) which is present in aremovable smart chip, a removable SD card, or is embedded in a fixed ICor chip of the electronic device 2301. In addition, the security module2336 may be driven by an OS different from the OS of the electronicdevice 2301. For example, the security module 2336 may operate based ona java card open platform (JCOP) OS.

The sensor module 2340 may measure, for example, a physical quantity,may detect an operational state of the electronic device 2301, and mayconvert the measured or detected information to an electrical signal.The sensor module 2340 may include at least one of, for example, agesture sensor 2340A, a gyro sensor 2340B, a barometric pressure sensor2340C, a magnetic sensor 2340D, an acceleration sensor 2340E, a gripsensor 2340F, a proximity sensor 2340G, a color sensor 2340H (e.g., ared, green, blue (RGB) sensor), a biometric sensor 2340I, atemperature/humidity sensor 2340J, an illumination sensor 2340K, or anultraviolet (UV) light sensor 2340M. Additionally or alternatively, thesensor module 2340 may further include, for example, an electronic nose(e-nose) sensor, an electromyography (EMG) sensor, anelectroencephalogram (EEG) sensor, an electrocardiogram (ECG) sensor, aninfrared (UV) sensor, an iris sensor, and/or a fingerprint sensor, andthe like. The sensor module 2340 may further include a control circuitfor controlling at least one or more sensors included therein. Theelectronic device 2301 may further include a processor adapted tocontrol the sensor module 2340, as part of the processor 2310 or to beindependent of the processor 2310. While the processor 2310 is in asleep state, the electronic device 2301 may control the sensor module2340.

The input device 2350 may include, for example, a touch panel 2352, a(digital) pen sensor 2354, a key 2356, or an ultrasonic input device2358. The touch panel 2352 may use at least one of, for example, acapacitive type touch panel, a resistive type touch panel, an infraredtype touch panel, or an ultrasonic type touch panel. In addition, thetouch panel 2352 may further include a control circuit. The touch panel2352 may further include a tactile layer and may provide a tactilereaction to a user.

The (digital) pen sensor 2354 may be, for example, part of the touchpanel 2352 or may include a separate sheet for recognition. The key 2356may include, for example, a physical button, an optical key, or akeypad. The ultrasonic input device 2358 may allow the electronic device2301 to detect a sound wave using a microphone 2388 and to verify datathrough an input tool generating an ultrasonic signal.

The display 2360 (e.g., a display 160 of FIG. 13 described above) mayinclude a panel 2362, a hologram device 2364, or a projector 2366. Thepanel 2362 may include the same or similar configuration as the display160. The panel 2362 may be implemented to be, for example, flexible,transparent, or wearable. The panel 2362 and the touch panel 2352 may beintegrated into one module. The hologram device 2364 may provide astereoscopic image in the air using the interference of light. Theprojector 2366 may project light onto a screen to display an image. Thescreen may be positioned, for example, inside or outside of theelectronic device 2301. The display 2360 may further include a controlcircuit for controlling the panel 2362, the hologram device 2364, or theprojector 2366.

The interface 2370 may include, for example, an HDMI 2372, a USB 2374,an optical interface 2376, or a D-subminiature (D-sub) connector 2378.The interface 2370 may be included in, for example, a communicationinterface 170 in FIG. 1 or 2 . Additionally or alternatively, theinterface 2370 may include, for example, a mobile high definition link(MHL) interface, an SD card/MMC interface, or an Infrared DataAssociation (IrDA) interface standard.

The audio module 2380 may convert a sound and an electrical signal indual directions. At least part of the components of the audio module2380 may be included in, for example, an input and output interface 150(or a user interface) in FIG. 13 described above. The audio module 2380may process sound information input or output through, for example, aspeaker 2382, a receiver 2384, an earphone 2386, the microphone 2388,and the like.

The camera module 2391 may be a device which captures a still image anda moving image. The camera module 2391 may include one or more imagesensors (e.g., a front sensor or a rear sensor), a lens, an image signalprocessor (ISP), or a flash (e.g., an LED or a xenon lamp).

The power management module 2395 may manage, for example, power of theelectronic device 2301. The power management module 2395 may include apower management integrated circuit (PMIC), a charger IC or a batterygauge. The PMIC may have a wired charging method and/or a wirelesscharging method. The wireless charging method may include, for example,a magnetic resonance method, a magnetic induction method, or anelectromagnetic method, and the like. An additional circuit for wirelesscharging, for example, a coil loop, a resonance circuit, or a rectifier,and the like may be further provided. The battery gauge may measure, forexample, the remaining capacity of the battery 2396 and voltage,current, or temperature thereof while the battery 2396 is charged. Thebattery 2396 may include, for example, a rechargeable battery or a solarbattery.

The indicator 2397 may display a specified state of the electronicdevice 2301 or part (e.g., the processor 2310) thereof, for example, abooting state, a message state, or a charging state, and the like. Themotor 2398 may convert an electrical signal into a mechanical vibration,generate a vibration or a haptic effect, and the like. The electronicdevice 2301 may include a processing unit (e.g., a GPU) for supporting amobile TV. The processing unit for supporting the mobile TV may processmedia data according to standards, for example, a digital multimediabroadcasting (DMB) standard, a digital video broadcasting (DVB)standard, or a mediaFlo™ standard, and the like.

Each of the above-mentioned elements of the electronic device accordingto various embodiments of the present disclosure may be adapted with oneor more components, and names of the corresponding elements may bechanged according to the type of the electronic device. The electronicdevice may include at least one of the above-mentioned elements, wheresome elements may be omitted from the electronic device, or otheradditional elements may be further included in the electronic device. Inaddition, some of the elements of the electronic device may be combinedwith each other to form one entity, thereby making it possible toperform the functions of the corresponding elements in the same manneras before the combination.

The term “module” used in the present disclosure may include a unitadapted in hardware, software, or firmware, and for example, may be usedinterchangeably with terms such as “logic,” “a logic block,” “acomponent,” and “a circuit.” The term “module” may indicate an integralcomponent, a minimum unit, or a part which performs one or morefunctions. The term “module” may indicate a device that may beimplemented mechanically or electronically, and for example, may includean application-specific integrated circuit (ASIC), field-programmablegate arrays (FPGSs), or a programmable logic device that is known orwill be developed in the future, which performs some operations.

At least some of the devices (e.g., modules or functions) or methods(e.g., steps) according to various embodiments of the present disclosuremay be implemented by an instruction stored in a non-transitorycomputer-readable recording medium (e.g., the memory 130), for example,in the form of a program module. If the instruction is executed by aprocessor, the processor may perform a function corresponding to theinstruction. The non-transitory computer-readable recording medium mayinclude a hard disk, a floppy disk, a magnetic medium (e.g., a magnetictape), an optical recording medium (e.g., a compact disc ROM (CD-ROM) ora DVD), a magneto-optical medium (e.g., a floptical disk), and anembedded memory. The instruction may include code generated by acompiler or code that may be executed by an interpreter.

A module or program module according to various embodiments of thepresent disclosure may include at least one of the above-mentionedelements, omit some of them, or further include other elements. Theoperations performed by a module, a program module, or another elementmay be executed sequentially, in parallel, repeatedly, or heuristically,or at least some operations may be executed in another sequence, may beomitted, or another operation may be added.

As described above, various embodiments may provide a structure by whicha finger may be easily disposed for fingerprint authentication while anelectronic device is gripped.

Further, various embodiments facilitate fingerprint authentication withan intuitive and simple operation.

Further, various embodiments help improve a fingerprint verificationrate of a fingerprint sensor disposed on a rear surface of a display.

While the present disclosure has been shown and described with referenceto various embodiments thereof, it will be understood by those skilledin the art that various changes in form and detail may be made thereinwithout departing from the scope of the present disclosure as defined bythe appended claims and their equivalents.

What is claimed is:
 1. An electronic device, comprising: a display inwhich a fingerprint recognition area is formed in at least one portionthereof and which includes a display pixel layer; a rear panel, formedunder the display, comprising a first hole corresponding to a portion ofthe display pixel layer; a bracket, disposed under the rear panel tosupport the display, comprising a sensor accommodating areacorresponding to the portion of the display pixel layer for disposing afingerprint sensor, and comprising a second hole passing through thebracket and aligned with the first hole; the fingerprint sensor alignedwith the second hole under the display pixel layer and adapted toacquire image information to be used for authentication of a fingerprintcorresponding to an object that approaches the fingerprint recognitionarea using, at least partially, light radiated from the display pixellayer and reflected by the object; a processor adapted to control atleast one function of the fingerprint sensor for the acquiring of theimage information; and a printed circuit board disposed under thebracket, wherein the printed circuit board is electronically connectedwith the fingerprint sensor.
 2. The electronic device of claim 1,wherein the rear panel includes a protective layer formed adjacent tothe display, and at least one portion of the first hole is formed in theprotective layer.
 3. The electronic device of claim 2, wherein: the rearpanel further includes a digitizer formed in or under the protectivelayer; and a portion of the first hole is formed in the digitizer. 4.The electronic device of claim 3, wherein the rear panel furtherincludes a heat radiating layer formed under the digitizer.
 5. Theelectronic device of claim 1, further comprising: a wavelength selectingelement aligned with the first hole and adapted to pass only a portionof the reflected light of having a specified wavelength.
 6. Theelectronic device of claim 1, wherein an optical bonding layer is formedin at least one portion of the first hole.
 7. The electronic device ofclaim 1, further comprising: a wavelength selecting element disposedbetween the display and the fingerprint sensor and adapted to pass onlya portion of the reflected light having a specified wavelength.
 8. Theelectronic device of claim 1, wherein the fingerprint recognition areaoccupies substantially an entire area of a display area, and thefingerprint sensor is aligned with the fingerprint recognition area. 9.The electronic device of claim 1, wherein the processor is furtheradapted to output a color having a specified wavelength via thefingerprint recognition area in response to a request to authenticatethe fingerprint.
 10. The electronic device of claim 1, wherein theprocessor is further adapted to: output a specified luminance via thefingerprint recognition area in response to a request to authenticatethe fingerprint.
 11. The electronic device of claim 1, wherein theprocessor is further adapted to: control the fingerprint recognitionarea based at least in part on a first display attribute in relationwith the acquiring of the image information; and control the fingerprintrecognition area based at least in part on a second display attribute ifthe acquired image information satisfies a specified condition.
 12. Theelectronic device of claim 11, wherein the processor is further adaptedto: adjust a color or a luminance as at least part of the controllingthe fingerprint recognition area based at least in part on the seconddisplay attribute.
 13. The electronic device of claim 1, wherein theprocessor is further adapted to: output, via the display, a userinterface to guide the approaching of the object to the fingerprintrecognition area in response to the request to authenticate thefingerprint.
 14. The electronic device of claim 1, wherein the processoris further adapted to: control the fingerprint recognition area based atleast in part on a first touch sensitivity; and control a peripheralarea of the fingerprint recognition area of the display based at leastin part on a second touch sensitivity.
 15. The electronic device ofclaim 14, wherein the processor is further adapted to: output aspecified luminance, or a color having a specified wavelength via thefingerprint recognition area if a hovering input is detected withrespect to the approaching of the object to the fingerprint recognitionarea based at least in part on the first touch sensitivity.
 16. Theelectronic device of claim 1, wherein the fingerprint sensor is incontact with a portion of a lower surface of the display correspondingto the fingerprint recognition area.
 17. The electronic device of claim1, wherein the first hole and the second hole are corresponding to thefingerprint sensor.
 18. The electronic device of claim 1, furthercomprising: a flexible printed circuit board electrically coupled to alayer extending from the display, the flexible printed circuit boardhaving a third hole, at least portion of the third hole defined thereinthat overlaps an area where the fingerprint sensor is provided when thelayer bended so as to dispose the flexible printed circuit board at arear side of the display.
 19. The electronic device of claim 18, whereinthe light radiated from the display pixel layer and reflected by theobject approaches to the fingerprint sensor through the first hole, thesecond hole and the third hole.